1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 43ee73f9a5SJeff Layton #include <linux/iversion.h> 44c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 45c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 489a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 49e5a185c2SLukas Czerner #include <linux/fs_context.h> 50e5a185c2SLukas Czerner #include <linux/fs_parser.h> 51bfff6873SLukas Czerner 523dcf5451SChristoph Hellwig #include "ext4.h" 534a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 543dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 55ac27a0ecSDave Kleikamp #include "xattr.h" 56ac27a0ecSDave Kleikamp #include "acl.h" 573661d286STheodore Ts'o #include "mballoc.h" 580c9ec4beSDarrick J. Wong #include "fsmap.h" 59ac27a0ecSDave Kleikamp 609bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 619bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 629bffad1eSTheodore Ts'o 630b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6459ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 65e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 669f6200bbSTheodore Ts'o 67617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 68ac27a0ecSDave Kleikamp unsigned long journal_devnum); 692adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 702d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 714392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7211215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 73617ba13bSMingming Cao struct ext4_super_block *es); 7411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 75617ba13bSMingming Cao struct ext4_super_block *es); 76617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 77617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 78c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 79c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 88b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 89e6e268cbSLukas Czerner struct super_block *sb); 9085456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb); 9102f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 92cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 93cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 94cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 95cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 96cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 97ac27a0ecSDave Kleikamp 98e74031fdSJan Kara /* 99e74031fdSJan Kara * Lock ordering 100e74031fdSJan Kara * 101e74031fdSJan Kara * page fault path: 102d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 103d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * buffered write path: 106c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 107e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 108e74031fdSJan Kara * i_data_sem (rw) 109e74031fdSJan Kara * 110e74031fdSJan Kara * truncate: 111d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 112d4f5258eSJan Kara * page lock 113d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1141d39834fSNikolay Borisov * i_data_sem (rw) 115e74031fdSJan Kara * 116e74031fdSJan Kara * direct IO: 117c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1181d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 119e74031fdSJan Kara * 120e74031fdSJan Kara * writepages: 121e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 122e74031fdSJan Kara */ 123e74031fdSJan Kara 12402f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12502f960f8SLukas Czerner .parse_param = ext4_parse_param, 126cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 127cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 128cebe85d5SLukas Czerner .free = ext4_fc_free, 12902f960f8SLukas Czerner }; 13002f960f8SLukas Czerner 13102f960f8SLukas Czerner 132c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1332035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1342035e776STheodore Ts'o .owner = THIS_MODULE, 1352035e776STheodore Ts'o .name = "ext2", 136cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 137cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1382035e776STheodore Ts'o .kill_sb = kill_block_super, 1392035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1402035e776STheodore Ts'o }; 1417f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 142fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1432035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1442035e776STheodore Ts'o #else 1452035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1462035e776STheodore Ts'o #endif 1472035e776STheodore Ts'o 1482035e776STheodore Ts'o 149ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 150ba69f9abSJan Kara .owner = THIS_MODULE, 151ba69f9abSJan Kara .name = "ext3", 152cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 153cebe85d5SLukas Czerner .parameters = ext4_param_specs, 154ba69f9abSJan Kara .kill_sb = kill_block_super, 155ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 156ba69f9abSJan Kara }; 1577f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 158fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 159ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 160bd81d8eeSLaurent Vivier 161fa491b14Szhangyi (F) 16267c0f556SBart Van Assche static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, 163fa491b14Szhangyi (F) bh_end_io_t *end_io) 164fa491b14Szhangyi (F) { 165fb265c9cSTheodore Ts'o /* 166fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 167fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 168fa491b14Szhangyi (F) * recheck the buffer contents. 169fa491b14Szhangyi (F) */ 170fa491b14Szhangyi (F) clear_buffer_verified(bh); 171fa491b14Szhangyi (F) 172fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 173fa491b14Szhangyi (F) get_bh(bh); 1741420c4a5SBart Van Assche submit_bh(REQ_OP_READ | op_flags, bh); 175fa491b14Szhangyi (F) } 176fa491b14Szhangyi (F) 17767c0f556SBart Van Assche void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, 178fa491b14Szhangyi (F) bh_end_io_t *end_io) 179fa491b14Szhangyi (F) { 180fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 181fa491b14Szhangyi (F) 182fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 183fa491b14Szhangyi (F) unlock_buffer(bh); 184fa491b14Szhangyi (F) return; 185fa491b14Szhangyi (F) } 186fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 187fa491b14Szhangyi (F) } 188fa491b14Szhangyi (F) 18967c0f556SBart Van Assche int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io) 190fa491b14Szhangyi (F) { 191fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 192fa491b14Szhangyi (F) 193fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 194fa491b14Szhangyi (F) unlock_buffer(bh); 195fa491b14Szhangyi (F) return 0; 196fa491b14Szhangyi (F) } 197fa491b14Szhangyi (F) 198fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 199fa491b14Szhangyi (F) 200fa491b14Szhangyi (F) wait_on_buffer(bh); 201fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 202fa491b14Szhangyi (F) return 0; 203fa491b14Szhangyi (F) return -EIO; 204fa491b14Szhangyi (F) } 205fa491b14Szhangyi (F) 20667c0f556SBart Van Assche int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait) 207fa491b14Szhangyi (F) { 208fa491b14Szhangyi (F) if (trylock_buffer(bh)) { 209fa491b14Szhangyi (F) if (wait) 210fa491b14Szhangyi (F) return ext4_read_bh(bh, op_flags, NULL); 211fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 212fa491b14Szhangyi (F) return 0; 213fa491b14Szhangyi (F) } 214fa491b14Szhangyi (F) if (wait) { 215fa491b14Szhangyi (F) wait_on_buffer(bh); 216fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 217fa491b14Szhangyi (F) return 0; 218fa491b14Szhangyi (F) return -EIO; 219fa491b14Szhangyi (F) } 220fa491b14Szhangyi (F) return 0; 221fa491b14Szhangyi (F) } 222fa491b14Szhangyi (F) 223fb265c9cSTheodore Ts'o /* 2248394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 225fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 226fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 227fb265c9cSTheodore Ts'o * return. 228fb265c9cSTheodore Ts'o */ 2298394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 23067c0f556SBart Van Assche sector_t block, 23167c0f556SBart Van Assche blk_opf_t op_flags, gfp_t gfp) 232fb265c9cSTheodore Ts'o { 2332d069c08Szhangyi (F) struct buffer_head *bh; 2342d069c08Szhangyi (F) int ret; 235fb265c9cSTheodore Ts'o 2368394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 237fb265c9cSTheodore Ts'o if (bh == NULL) 238fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 239cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 240fb265c9cSTheodore Ts'o return bh; 2412d069c08Szhangyi (F) 2422d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2432d069c08Szhangyi (F) if (ret) { 244fb265c9cSTheodore Ts'o put_bh(bh); 2452d069c08Szhangyi (F) return ERR_PTR(ret); 2462d069c08Szhangyi (F) } 2472d069c08Szhangyi (F) return bh; 248fb265c9cSTheodore Ts'o } 249fb265c9cSTheodore Ts'o 2508394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 25167c0f556SBart Van Assche blk_opf_t op_flags) 2528394a6abSzhangyi (F) { 2538394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2548394a6abSzhangyi (F) } 2558394a6abSzhangyi (F) 2568394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2578394a6abSzhangyi (F) sector_t block) 2588394a6abSzhangyi (F) { 2598394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2608394a6abSzhangyi (F) } 2618394a6abSzhangyi (F) 2625df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2635df1d412Szhangyi (F) { 2645df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2655df1d412Szhangyi (F) 2665df1d412Szhangyi (F) if (likely(bh)) { 2675df1d412Szhangyi (F) ext4_read_bh_lock(bh, REQ_RAHEAD, false); 2685df1d412Szhangyi (F) brelse(bh); 2695df1d412Szhangyi (F) } 270c197855eSStephen Hemminger } 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2739aa5d32bSDmitry Monakhov struct ext4_super_block *es) 274a9c47317SDarrick J. Wong { 275a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 276a9c47317SDarrick J. Wong return 1; 277a9c47317SDarrick J. Wong 278a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27906db49e6STheodore Ts'o } 280a9c47317SDarrick J. Wong 281bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 282a9c47317SDarrick J. Wong struct ext4_super_block *es) 283a9c47317SDarrick J. Wong { 284a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 285a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 286a9c47317SDarrick J. Wong __u32 csum; 287a9c47317SDarrick J. Wong 288a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 289a9c47317SDarrick J. Wong 290a9c47317SDarrick J. Wong return cpu_to_le32(csum); 291a9c47317SDarrick J. Wong } 292a9c47317SDarrick J. Wong 293a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 294a9c47317SDarrick J. Wong struct ext4_super_block *es) 295a9c47317SDarrick J. Wong { 296a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 297a9c47317SDarrick J. Wong return 1; 298a9c47317SDarrick J. Wong 299a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 300a9c47317SDarrick J. Wong } 301a9c47317SDarrick J. Wong 302a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 303a9c47317SDarrick J. Wong { 30406db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 30506db49e6STheodore Ts'o 3069aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 307a9c47317SDarrick J. Wong return; 308a9c47317SDarrick J. Wong 309a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 310a9c47317SDarrick J. Wong } 311a9c47317SDarrick J. Wong 3128fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3138fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 314bd81d8eeSLaurent Vivier { 3153a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3168fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3178fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 318bd81d8eeSLaurent Vivier } 319bd81d8eeSLaurent Vivier 3208fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3218fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 322bd81d8eeSLaurent Vivier { 3235272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3248fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3258fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 326bd81d8eeSLaurent Vivier } 327bd81d8eeSLaurent Vivier 3288fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3298fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 330bd81d8eeSLaurent Vivier { 3315272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3328fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3338fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 334bd81d8eeSLaurent Vivier } 335bd81d8eeSLaurent Vivier 336021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 337560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 338560671a0SAneesh Kumar K.V { 339560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 340560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 341560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 342560671a0SAneesh Kumar K.V } 343560671a0SAneesh Kumar K.V 344560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 345560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 346560671a0SAneesh Kumar K.V { 347560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 348560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 349560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 350560671a0SAneesh Kumar K.V } 351560671a0SAneesh Kumar K.V 352560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 353560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 354560671a0SAneesh Kumar K.V { 355560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 356560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 357560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 358560671a0SAneesh Kumar K.V } 359560671a0SAneesh Kumar K.V 360560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 361560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 362560671a0SAneesh Kumar K.V { 363560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 364560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 365560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 366560671a0SAneesh Kumar K.V } 367560671a0SAneesh Kumar K.V 3688fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3698fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 370bd81d8eeSLaurent Vivier { 3713a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3728fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3738fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 374bd81d8eeSLaurent Vivier } 375bd81d8eeSLaurent Vivier 3768fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3778fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 378bd81d8eeSLaurent Vivier { 3795272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3808fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3818fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 382bd81d8eeSLaurent Vivier } 383bd81d8eeSLaurent Vivier 3848fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3858fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 386bd81d8eeSLaurent Vivier { 3875272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3888fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3898fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 390bd81d8eeSLaurent Vivier } 391bd81d8eeSLaurent Vivier 392021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 393560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 394560671a0SAneesh Kumar K.V { 395560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 396560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 397560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 398560671a0SAneesh Kumar K.V } 399560671a0SAneesh Kumar K.V 400560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 401560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 402560671a0SAneesh Kumar K.V { 403560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 404560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 405560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 406560671a0SAneesh Kumar K.V } 407560671a0SAneesh Kumar K.V 408560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 409560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 410560671a0SAneesh Kumar K.V { 411560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 412560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 413560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 414560671a0SAneesh Kumar K.V } 415560671a0SAneesh Kumar K.V 416560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 417560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 418560671a0SAneesh Kumar K.V { 419560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 420560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 421560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 422560671a0SAneesh Kumar K.V } 423560671a0SAneesh Kumar K.V 424c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4256a0678a7SArnd Bergmann { 4266a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4276a0678a7SArnd Bergmann 4286a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4296a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4306a0678a7SArnd Bergmann } 4316a0678a7SArnd Bergmann 4326a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4336a0678a7SArnd Bergmann { 4346a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4356a0678a7SArnd Bergmann } 4366a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 437c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 438c92dc856SJan Kara ktime_get_real_seconds()) 4396a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4406a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 441d3d1faf6SCurt Wohlgemuth 442bdfe0cbdSTheodore Ts'o /* 443bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 444bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 445bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 446bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 447bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 448bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 449bdfe0cbdSTheodore Ts'o */ 450bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 451bdfe0cbdSTheodore Ts'o { 452bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 453bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 454bdfe0cbdSTheodore Ts'o 455bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 456bdfe0cbdSTheodore Ts'o } 457bdfe0cbdSTheodore Ts'o 45818aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45918aadd47SBobi Jam { 46018aadd47SBobi Jam struct super_block *sb = journal->j_private; 46118aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 46218aadd47SBobi Jam int error = is_journal_aborted(journal); 4635d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 46418aadd47SBobi Jam 4655d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 466a0154344SDaeho Jeong 467a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 468a0154344SDaeho Jeong 46918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4705d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4715d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4725d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 47318aadd47SBobi Jam list_del_init(&jce->jce_list); 47418aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47518aadd47SBobi Jam jce->jce_func(sb, jce, error); 47618aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47718aadd47SBobi Jam } 47818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47918aadd47SBobi Jam } 4801c13d5c0STheodore Ts'o 481afb585a9SMauricio Faria de Oliveira /* 482afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 483afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 484afb585a9SMauricio Faria de Oliveira * 485afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 486afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 487afb585a9SMauricio Faria de Oliveira * to write protect the pages. 488afb585a9SMauricio Faria de Oliveira * 489afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 490afb585a9SMauricio Faria de Oliveira */ 491afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 492afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 493afb585a9SMauricio Faria de Oliveira void *data) 494afb585a9SMauricio Faria de Oliveira { 495afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 496afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 497afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 498afb585a9SMauricio Faria de Oliveira 499afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 500afb585a9SMauricio Faria de Oliveira do { 501afb585a9SMauricio Faria de Oliveira /* 502afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 503afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 504afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 505afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 506afb585a9SMauricio Faria de Oliveira * properly. 507afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 508afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 509afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 510afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 511afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 512afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 513afb585a9SMauricio Faria de Oliveira */ 514afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 515afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 516afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 517afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 518afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 519afb585a9SMauricio Faria de Oliveira goto out; 520afb585a9SMauricio Faria de Oliveira } 521afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 522afb585a9SMauricio Faria de Oliveira 523afb585a9SMauricio Faria de Oliveira out: 524afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 525afb585a9SMauricio Faria de Oliveira } 526afb585a9SMauricio Faria de Oliveira 527afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 528afb585a9SMauricio Faria de Oliveira { 529afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 530afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 531afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 532afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 533afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 534afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 535afb585a9SMauricio Faria de Oliveira }; 536afb585a9SMauricio Faria de Oliveira 537afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 538afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 539afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 540afb585a9SMauricio Faria de Oliveira } 541afb585a9SMauricio Faria de Oliveira 542afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 543afb585a9SMauricio Faria de Oliveira { 544afb585a9SMauricio Faria de Oliveira int ret; 545afb585a9SMauricio Faria de Oliveira 546afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 547afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 548afb585a9SMauricio Faria de Oliveira else 549afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 550afb585a9SMauricio Faria de Oliveira 551afb585a9SMauricio Faria de Oliveira return ret; 552afb585a9SMauricio Faria de Oliveira } 553afb585a9SMauricio Faria de Oliveira 554afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 555afb585a9SMauricio Faria de Oliveira { 556afb585a9SMauricio Faria de Oliveira int ret = 0; 557afb585a9SMauricio Faria de Oliveira 558afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 559afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 560afb585a9SMauricio Faria de Oliveira 561afb585a9SMauricio Faria de Oliveira return ret; 562afb585a9SMauricio Faria de Oliveira } 563afb585a9SMauricio Faria de Oliveira 5641dc1097fSJan Kara static bool system_going_down(void) 5651dc1097fSJan Kara { 5661dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5671dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5681dc1097fSJan Kara } 5691dc1097fSJan Kara 57002a7780eSJan Kara struct ext4_err_translation { 57102a7780eSJan Kara int code; 57202a7780eSJan Kara int errno; 57302a7780eSJan Kara }; 57402a7780eSJan Kara 57502a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 57602a7780eSJan Kara 57702a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58702a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58802a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 58902a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 59002a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 59102a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 59202a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 59302a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 59402a7780eSJan Kara }; 59502a7780eSJan Kara 59602a7780eSJan Kara static int ext4_errno_to_code(int errno) 59702a7780eSJan Kara { 59802a7780eSJan Kara int i; 59902a7780eSJan Kara 60002a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 60102a7780eSJan Kara if (err_translation[i].errno == errno) 60202a7780eSJan Kara return err_translation[i].code; 60302a7780eSJan Kara return EXT4_ERR_UNKNOWN; 60402a7780eSJan Kara } 60502a7780eSJan Kara 6062d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60740676623SJan Kara __u32 ino, __u64 block, 60840676623SJan Kara const char *func, unsigned int line) 60940676623SJan Kara { 610c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 61140676623SJan Kara 61202a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 61302a7780eSJan Kara if (error == 0) 61402a7780eSJan Kara error = EFSCORRUPTED; 615c92dc856SJan Kara 616c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 617c92dc856SJan Kara sbi->s_add_error_count++; 618c92dc856SJan Kara sbi->s_last_error_code = error; 619c92dc856SJan Kara sbi->s_last_error_line = line; 620c92dc856SJan Kara sbi->s_last_error_ino = ino; 621c92dc856SJan Kara sbi->s_last_error_block = block; 622c92dc856SJan Kara sbi->s_last_error_func = func; 623c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 624c92dc856SJan Kara if (!sbi->s_first_error_time) { 625c92dc856SJan Kara sbi->s_first_error_code = error; 626c92dc856SJan Kara sbi->s_first_error_line = line; 627c92dc856SJan Kara sbi->s_first_error_ino = ino; 628c92dc856SJan Kara sbi->s_first_error_block = block; 629c92dc856SJan Kara sbi->s_first_error_func = func; 630c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 63140676623SJan Kara } 632c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 63340676623SJan Kara } 63440676623SJan Kara 635ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 636ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 637ac27a0ecSDave Kleikamp * 638ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 639617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 640ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 641ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 642ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 643ac27a0ecSDave Kleikamp * write out the superblock safely. 644ac27a0ecSDave Kleikamp * 645dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 646d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 647ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 648014c9caaSJan Kara * 649014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 650014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 651014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 652014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 653014c9caaSJan Kara * at a critical moment in log management. 654ac27a0ecSDave Kleikamp */ 655e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 656e789ca0cSJan Kara __u32 ino, __u64 block, 657e789ca0cSJan Kara const char *func, unsigned int line) 658ac27a0ecSDave Kleikamp { 659b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6602d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 661b08070ecSJan Kara 662e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 663327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 664327eaf73STheodore Ts'o WARN_ON_ONCE(1); 665327eaf73STheodore Ts'o 6662d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6679b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 668ac27a0ecSDave Kleikamp if (journal) 669dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6702d01ddc8SJan Kara } 6712d01ddc8SJan Kara 6722d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6732d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6742d01ddc8SJan Kara /* 6752d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6762d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6772d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6782d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6792d01ddc8SJan Kara */ 680bb9464e0Syangerkun if (continue_fs && journal) 6812d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6822d01ddc8SJan Kara else 6832d01ddc8SJan Kara ext4_commit_super(sb); 6842d01ddc8SJan Kara } 6852d01ddc8SJan Kara 6861dc1097fSJan Kara /* 6871dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6881dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6891dc1097fSJan Kara * disabled. 6901dc1097fSJan Kara */ 691014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 692617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 693ac27a0ecSDave Kleikamp sb->s_id); 694ac27a0ecSDave Kleikamp } 695ac2f7ca5SYe Bin 696ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 697ac2f7ca5SYe Bin return; 698ac2f7ca5SYe Bin 699014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 700014c9caaSJan Kara /* 701014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 702014c9caaSJan Kara * ->s_flags update 703014c9caaSJan Kara */ 704014c9caaSJan Kara smp_wmb(); 705014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7064327ba52SDaeho Jeong } 707ac27a0ecSDave Kleikamp 708c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 709c92dc856SJan Kara { 710c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 711c92dc856SJan Kara s_error_work); 7122d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7132d01ddc8SJan Kara handle_t *handle; 714c92dc856SJan Kara 7152d01ddc8SJan Kara /* 7162d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7172d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7182d01ddc8SJan Kara * updates. 7192d01ddc8SJan Kara * 7202d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7212d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7222d01ddc8SJan Kara */ 7232d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 724558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7252d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7262d01ddc8SJan Kara if (IS_ERR(handle)) 7272d01ddc8SJan Kara goto write_directly; 728558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7292d01ddc8SJan Kara jbd2_journal_stop(handle); 7302d01ddc8SJan Kara goto write_directly; 7312d01ddc8SJan Kara } 7322d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 733558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 734558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 735558d6450SYe Bin "superblock detected"); 736558d6450SYe Bin clear_buffer_write_io_error(sbh); 737558d6450SYe Bin set_buffer_uptodate(sbh); 738558d6450SYe Bin } 739558d6450SYe Bin 740558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7412d01ddc8SJan Kara jbd2_journal_stop(handle); 7422d01ddc8SJan Kara goto write_directly; 7432d01ddc8SJan Kara } 7442d01ddc8SJan Kara jbd2_journal_stop(handle); 745d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7462d01ddc8SJan Kara return; 7472d01ddc8SJan Kara } 7482d01ddc8SJan Kara write_directly: 7492d01ddc8SJan Kara /* 7502d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7512d01ddc8SJan Kara * out and hope for the best. 7522d01ddc8SJan Kara */ 7534392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 754d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 755ac27a0ecSDave Kleikamp } 756ac27a0ecSDave Kleikamp 757efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 758efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 759efbed4dcSTheodore Ts'o "EXT4-fs error") 760efbed4dcSTheodore Ts'o 76112062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 762014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 76354d3adbcSTheodore Ts'o const char *fmt, ...) 764ac27a0ecSDave Kleikamp { 7650ff2ea7dSJoe Perches struct va_format vaf; 766ac27a0ecSDave Kleikamp va_list args; 767ac27a0ecSDave Kleikamp 7680db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7690db1ff22STheodore Ts'o return; 7700db1ff22STheodore Ts'o 771ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 772efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 773ac27a0ecSDave Kleikamp va_start(args, fmt); 7740ff2ea7dSJoe Perches vaf.fmt = fmt; 7750ff2ea7dSJoe Perches vaf.va = &args; 776efbed4dcSTheodore Ts'o printk(KERN_CRIT 777efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7780ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 779ac27a0ecSDave Kleikamp va_end(args); 780efbed4dcSTheodore Ts'o } 7819a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7829a089b21SGabriel Krisman Bertazi 783e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 784ac27a0ecSDave Kleikamp } 785ac27a0ecSDave Kleikamp 786e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78754d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 788273df556SFrank Mayhar const char *fmt, ...) 789273df556SFrank Mayhar { 790273df556SFrank Mayhar va_list args; 791f7c21177STheodore Ts'o struct va_format vaf; 792273df556SFrank Mayhar 7930db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7940db1ff22STheodore Ts'o return; 7950db1ff22STheodore Ts'o 796ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 797efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 798273df556SFrank Mayhar va_start(args, fmt); 799f7c21177STheodore Ts'o vaf.fmt = fmt; 800f7c21177STheodore Ts'o vaf.va = &args; 801c398eda0STheodore Ts'o if (block) 802d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 803d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 804d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 805d9ee81daSJoe Perches block, current->comm, &vaf); 806d9ee81daSJoe Perches else 807d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 808d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 809d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 810d9ee81daSJoe Perches current->comm, &vaf); 811273df556SFrank Mayhar va_end(args); 812efbed4dcSTheodore Ts'o } 8139a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8149a089b21SGabriel Krisman Bertazi 815e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 81654d3adbcSTheodore Ts'o function, line); 817273df556SFrank Mayhar } 818273df556SFrank Mayhar 819e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 820f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 821f7c21177STheodore Ts'o const char *fmt, ...) 822273df556SFrank Mayhar { 823273df556SFrank Mayhar va_list args; 824f7c21177STheodore Ts'o struct va_format vaf; 825496ad9aaSAl Viro struct inode *inode = file_inode(file); 826273df556SFrank Mayhar char pathname[80], *path; 827273df556SFrank Mayhar 8280db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8290db1ff22STheodore Ts'o return; 8300db1ff22STheodore Ts'o 831ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 832efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8339bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 834f9a62d09SDan Carpenter if (IS_ERR(path)) 835273df556SFrank Mayhar path = "(unknown)"; 836f7c21177STheodore Ts'o va_start(args, fmt); 837f7c21177STheodore Ts'o vaf.fmt = fmt; 838f7c21177STheodore Ts'o vaf.va = &args; 839d9ee81daSJoe Perches if (block) 840d9ee81daSJoe Perches printk(KERN_CRIT 841d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 842d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 843d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 844d9ee81daSJoe Perches block, current->comm, path, &vaf); 845d9ee81daSJoe Perches else 846d9ee81daSJoe Perches printk(KERN_CRIT 847d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 848d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 849d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 850d9ee81daSJoe Perches current->comm, path, &vaf); 851273df556SFrank Mayhar va_end(args); 852efbed4dcSTheodore Ts'o } 8539a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8549a089b21SGabriel Krisman Bertazi 855e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 85654d3adbcSTheodore Ts'o function, line); 857273df556SFrank Mayhar } 858273df556SFrank Mayhar 859722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 860ac27a0ecSDave Kleikamp char nbuf[16]) 861ac27a0ecSDave Kleikamp { 862ac27a0ecSDave Kleikamp char *errstr = NULL; 863ac27a0ecSDave Kleikamp 864ac27a0ecSDave Kleikamp switch (errno) { 8656a797d27SDarrick J. Wong case -EFSCORRUPTED: 8666a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8676a797d27SDarrick J. Wong break; 8686a797d27SDarrick J. Wong case -EFSBADCRC: 8696a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8706a797d27SDarrick J. Wong break; 871ac27a0ecSDave Kleikamp case -EIO: 872ac27a0ecSDave Kleikamp errstr = "IO failure"; 873ac27a0ecSDave Kleikamp break; 874ac27a0ecSDave Kleikamp case -ENOMEM: 875ac27a0ecSDave Kleikamp errstr = "Out of memory"; 876ac27a0ecSDave Kleikamp break; 877ac27a0ecSDave Kleikamp case -EROFS: 87878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 87978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 880ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 881ac27a0ecSDave Kleikamp else 882ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 883ac27a0ecSDave Kleikamp break; 884ac27a0ecSDave Kleikamp default: 885ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 886ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 887ac27a0ecSDave Kleikamp * NULL. */ 888ac27a0ecSDave Kleikamp if (nbuf) { 889ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 890ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 891ac27a0ecSDave Kleikamp errstr = nbuf; 892ac27a0ecSDave Kleikamp } 893ac27a0ecSDave Kleikamp break; 894ac27a0ecSDave Kleikamp } 895ac27a0ecSDave Kleikamp 896ac27a0ecSDave Kleikamp return errstr; 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 899617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 900ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 901ac27a0ecSDave Kleikamp 902c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 903c398eda0STheodore Ts'o unsigned int line, int errno) 904ac27a0ecSDave Kleikamp { 905ac27a0ecSDave Kleikamp char nbuf[16]; 906ac27a0ecSDave Kleikamp const char *errstr; 907ac27a0ecSDave Kleikamp 9080db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9090db1ff22STheodore Ts'o return; 9100db1ff22STheodore Ts'o 911ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 912ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 913ac27a0ecSDave Kleikamp * an error. */ 914bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 915ac27a0ecSDave Kleikamp return; 916ac27a0ecSDave Kleikamp 917efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 918617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 919c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 920c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 921efbed4dcSTheodore Ts'o } 9229a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 923ac27a0ecSDave Kleikamp 924e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 925ac27a0ecSDave Kleikamp } 926ac27a0ecSDave Kleikamp 927e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 928e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 929b31e1552SEric Sandeen { 9300ff2ea7dSJoe Perches struct va_format vaf; 931b31e1552SEric Sandeen va_list args; 932b31e1552SEric Sandeen 933da812f61SLukas Czerner if (sb) { 9341cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 935da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 936da812f61SLukas Czerner "EXT4-fs")) 937efbed4dcSTheodore Ts'o return; 938da812f61SLukas Czerner } 939efbed4dcSTheodore Ts'o 940b31e1552SEric Sandeen va_start(args, fmt); 9410ff2ea7dSJoe Perches vaf.fmt = fmt; 9420ff2ea7dSJoe Perches vaf.va = &args; 943da812f61SLukas Czerner if (sb) 9440ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 945da812f61SLukas Czerner else 946da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 947b31e1552SEric Sandeen va_end(args); 948b31e1552SEric Sandeen } 949b31e1552SEric Sandeen 9501cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9511cf006edSDmitry Monakhov { 9521cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9531cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9541cf006edSDmitry Monakhov "EXT4-fs warning"); 9551cf006edSDmitry Monakhov } 956b03a2f7eSAndreas Dilger 95712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 958c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 959ac27a0ecSDave Kleikamp { 9600ff2ea7dSJoe Perches struct va_format vaf; 961ac27a0ecSDave Kleikamp va_list args; 962ac27a0ecSDave Kleikamp 963b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 964efbed4dcSTheodore Ts'o return; 965efbed4dcSTheodore Ts'o 966ac27a0ecSDave Kleikamp va_start(args, fmt); 9670ff2ea7dSJoe Perches vaf.fmt = fmt; 9680ff2ea7dSJoe Perches vaf.va = &args; 9690ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9700ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 971ac27a0ecSDave Kleikamp va_end(args); 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 974b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 975b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 976b03a2f7eSAndreas Dilger { 977b03a2f7eSAndreas Dilger struct va_format vaf; 978b03a2f7eSAndreas Dilger va_list args; 979b03a2f7eSAndreas Dilger 980b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 981b03a2f7eSAndreas Dilger return; 982b03a2f7eSAndreas Dilger 983b03a2f7eSAndreas Dilger va_start(args, fmt); 984b03a2f7eSAndreas Dilger vaf.fmt = fmt; 985b03a2f7eSAndreas Dilger vaf.va = &args; 986b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 987b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 988b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 989b03a2f7eSAndreas Dilger va_end(args); 990b03a2f7eSAndreas Dilger } 991b03a2f7eSAndreas Dilger 992e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 993e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 994e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 995e29136f8STheodore Ts'o const char *fmt, ...) 9965d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9975d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9985d1b1b3fSAneesh Kumar K.V { 9990ff2ea7dSJoe Perches struct va_format vaf; 10005d1b1b3fSAneesh Kumar K.V va_list args; 10015d1b1b3fSAneesh Kumar K.V 10020db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 10030db1ff22STheodore Ts'o return; 10040db1ff22STheodore Ts'o 1005ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1006efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10075d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10080ff2ea7dSJoe Perches vaf.fmt = fmt; 10090ff2ea7dSJoe Perches vaf.va = &args; 101021149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1011e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1012e29136f8STheodore Ts'o if (ino) 10130ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1014e29136f8STheodore Ts'o if (block) 1015efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1016efbed4dcSTheodore Ts'o (unsigned long long) block); 10170ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10185d1b1b3fSAneesh Kumar K.V va_end(args); 1019efbed4dcSTheodore Ts'o } 10205d1b1b3fSAneesh Kumar K.V 1021c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1022327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1023327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1024e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10252d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10262d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10272d01ddc8SJan Kara line); 1028c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10292d01ddc8SJan Kara } 10305d1b1b3fSAneesh Kumar K.V return; 10315d1b1b3fSAneesh Kumar K.V } 10325d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1033e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10345d1b1b3fSAneesh Kumar K.V /* 10355d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10365d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10375d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10385d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10395d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 104025985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10415d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10425d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10435d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10445d1b1b3fSAneesh Kumar K.V */ 10455d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10465d1b1b3fSAneesh Kumar K.V return; 10475d1b1b3fSAneesh Kumar K.V } 10485d1b1b3fSAneesh Kumar K.V 1049db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1050db79e6d1SWang Shilong ext4_group_t group, 1051db79e6d1SWang Shilong unsigned int flags) 1052db79e6d1SWang Shilong { 1053db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1054db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1055db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10569af0b3d1SWang Shilong int ret; 1057db79e6d1SWang Shilong 10589af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10599af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10609af0b3d1SWang Shilong &grp->bb_state); 10619af0b3d1SWang Shilong if (!ret) 1062db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1063db79e6d1SWang Shilong grp->bb_free); 1064db79e6d1SWang Shilong } 1065db79e6d1SWang Shilong 10669af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10679af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10689af0b3d1SWang Shilong &grp->bb_state); 10699af0b3d1SWang Shilong if (!ret && gdp) { 1070db79e6d1SWang Shilong int count; 1071db79e6d1SWang Shilong 1072db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1073db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1074db79e6d1SWang Shilong count); 1075db79e6d1SWang Shilong } 1076db79e6d1SWang Shilong } 1077db79e6d1SWang Shilong } 1078db79e6d1SWang Shilong 1079617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1080ac27a0ecSDave Kleikamp { 1081617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1082ac27a0ecSDave Kleikamp 1083617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1084ac27a0ecSDave Kleikamp return; 1085ac27a0ecSDave Kleikamp 108612062dddSEric Sandeen ext4_warning(sb, 1087ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1088ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1089617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1090ac27a0ecSDave Kleikamp 1091617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1092617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1093617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1094ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1095ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1096ac27a0ecSDave Kleikamp 1097ac27a0ecSDave Kleikamp /* 1098ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1099ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1100ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1101ac27a0ecSDave Kleikamp */ 1102ac27a0ecSDave Kleikamp } 1103ac27a0ecSDave Kleikamp 1104ac27a0ecSDave Kleikamp /* 1105ac27a0ecSDave Kleikamp * Open the external journal device 1106ac27a0ecSDave Kleikamp */ 1107b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1108ac27a0ecSDave Kleikamp { 1109ac27a0ecSDave Kleikamp struct block_device *bdev; 1110ac27a0ecSDave Kleikamp 1111d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1112ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1113ac27a0ecSDave Kleikamp goto fail; 1114ac27a0ecSDave Kleikamp return bdev; 1115ac27a0ecSDave Kleikamp 1116ac27a0ecSDave Kleikamp fail: 1117ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1118ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1119ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1120ac27a0ecSDave Kleikamp return NULL; 1121ac27a0ecSDave Kleikamp } 1122ac27a0ecSDave Kleikamp 1123ac27a0ecSDave Kleikamp /* 1124ac27a0ecSDave Kleikamp * Release the journal device 1125ac27a0ecSDave Kleikamp */ 11264385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1127ac27a0ecSDave Kleikamp { 11284385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1129ac27a0ecSDave Kleikamp } 1130ac27a0ecSDave Kleikamp 11314385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1132ac27a0ecSDave Kleikamp { 1133ac27a0ecSDave Kleikamp struct block_device *bdev; 1134ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1135ac27a0ecSDave Kleikamp if (bdev) { 11364385bab1SAl Viro ext4_blkdev_put(bdev); 1137ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1138ac27a0ecSDave Kleikamp } 1139ac27a0ecSDave Kleikamp } 1140ac27a0ecSDave Kleikamp 1141ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1142ac27a0ecSDave Kleikamp { 1143617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1144ac27a0ecSDave Kleikamp } 1145ac27a0ecSDave Kleikamp 1146617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1147ac27a0ecSDave Kleikamp { 1148ac27a0ecSDave Kleikamp struct list_head *l; 1149ac27a0ecSDave Kleikamp 1150b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1151ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1152ac27a0ecSDave Kleikamp 1153ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1154ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1155ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1156ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1157ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1158ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1159ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1160ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1161ac27a0ecSDave Kleikamp } 1162ac27a0ecSDave Kleikamp } 1163ac27a0ecSDave Kleikamp 1164957153fcSJan Kara #ifdef CONFIG_QUOTA 1165957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1166957153fcSJan Kara 1167957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1168957153fcSJan Kara { 1169957153fcSJan Kara int type; 1170957153fcSJan Kara 1171957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1172957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1173957153fcSJan Kara ext4_quota_off(sb, type); 1174957153fcSJan Kara } 117533458eabSTheodore Ts'o 117633458eabSTheodore Ts'o /* 117733458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117833458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117933458eabSTheodore Ts'o */ 118033458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 118133458eabSTheodore Ts'o struct ext4_sb_info *sbi, 118233458eabSTheodore Ts'o int type) 118333458eabSTheodore Ts'o { 118433458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 118533458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118633458eabSTheodore Ts'o } 1187957153fcSJan Kara #else 1188957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1189957153fcSJan Kara { 1190957153fcSJan Kara } 1191957153fcSJan Kara #endif 1192957153fcSJan Kara 1193617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1194ac27a0ecSDave Kleikamp { 1195617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1196617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11971d0c3924STheodore Ts'o struct buffer_head **group_desc; 11987c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 119997abd7d4STheodore Ts'o int aborted = 0; 1200ef2cabf7SHidehiro Kawai int i, err; 1201ac27a0ecSDave Kleikamp 1202b98535d0SYe Bin /* 1203b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1204b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1205b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1206b98535d0SYe Bin * Unregister sysfs before flush sbi->s_error_work. 1207b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1208b98535d0SYe Bin * read metadata verify failed then will queue error work. 1209b98535d0SYe Bin * flush_stashed_error_work will call start_this_handle may trigger 1210b98535d0SYe Bin * BUG_ON. 1211b98535d0SYe Bin */ 1212b98535d0SYe Bin ext4_unregister_sysfs(sb); 1213b98535d0SYe Bin 12144808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 12154808cb5bSZhang Yi ext4_msg(sb, KERN_INFO, "unmounting filesystem."); 12164808cb5bSZhang Yi 1217857ac889SLukas Czerner ext4_unregister_li_request(sb); 1218957153fcSJan Kara ext4_quota_off_umount(sb); 1219e0ccfd95SChristoph Hellwig 1220c92dc856SJan Kara flush_work(&sbi->s_error_work); 12212e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 122202f310fcSJan Kara ext4_release_orphan_info(sb); 12234c0425ffSMingming Cao 12240390131bSFrank Mayhar if (sbi->s_journal) { 122597abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1226ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 122747b4a50bSJan Kara sbi->s_journal = NULL; 1228878520acSTheodore Ts'o if ((err < 0) && !aborted) { 122954d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12300390131bSFrank Mayhar } 1231878520acSTheodore Ts'o } 1232d4edac31SJosef Bacik 1233d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12349105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1235d4edac31SJosef Bacik ext4_release_system_zone(sb); 1236d4edac31SJosef Bacik ext4_mb_release(sb); 1237d4edac31SJosef Bacik ext4_ext_release(sb); 1238d4edac31SJosef Bacik 1239bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1240e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 124102f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1242ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1243ac27a0ecSDave Kleikamp } 1244bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12454392fbc4SJan Kara ext4_commit_super(sb); 1246a8e25a83SArtem Bityutskiy 12471d0c3924STheodore Ts'o rcu_read_lock(); 12481d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1249ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12501d0c3924STheodore Ts'o brelse(group_desc[i]); 12511d0c3924STheodore Ts'o kvfree(group_desc); 12527c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12537c990728SSuraj Jitindar Singh if (flex_groups) { 12547c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12557c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12567c990728SSuraj Jitindar Singh kvfree(flex_groups); 12577c990728SSuraj Jitindar Singh } 12581d0c3924STheodore Ts'o rcu_read_unlock(); 125957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1260ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1261ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 126257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1263efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1264bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1265ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1266a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 126733458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1268ac27a0ecSDave Kleikamp #endif 1269ac27a0ecSDave Kleikamp 1270ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1271ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1272ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1273ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1274ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1275ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1276837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1277ac27a0ecSDave Kleikamp 127889d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1279f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1280ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1281ac27a0ecSDave Kleikamp /* 1282ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1283ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1284ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1285ac27a0ecSDave Kleikamp */ 1286ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1287ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1288617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1289ac27a0ecSDave Kleikamp } 129050c15df6SChengguang Xu 1291dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1292dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 129350c15df6SChengguang Xu 129447387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 129547387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 129650c15df6SChengguang Xu 1297618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1298618f0031SPavel Skripkin 12999060dd2cSEric Sandeen brelse(sbi->s_sbh); 1300ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 13013197ebdbSTheodore Ts'o /* 13023197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 13033197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 13043197ebdbSTheodore Ts'o */ 13053197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13063197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13070441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13080441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1309705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13108012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1311ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13125298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1313f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1314c83ad55eSGabriel Krisman Bertazi #endif 1315ac27a0ecSDave Kleikamp kfree(sbi); 1316ac27a0ecSDave Kleikamp } 1317ac27a0ecSDave Kleikamp 1318e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1319ac27a0ecSDave Kleikamp 1320ac27a0ecSDave Kleikamp /* 1321ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1322ac27a0ecSDave Kleikamp */ 1323617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1324ac27a0ecSDave Kleikamp { 1325617ba13bSMingming Cao struct ext4_inode_info *ei; 1326ac27a0ecSDave Kleikamp 1327fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1328ac27a0ecSDave Kleikamp if (!ei) 1329ac27a0ecSDave Kleikamp return NULL; 13300b8e58a1SAndreas Dilger 1331ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1332202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1333c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 133427bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1335c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13369a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13379a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1338edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1339eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1340edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1341dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1342d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1343d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13441dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1345a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1346a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 134796c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1348a9e7f447SDmitry Monakhov #endif 13498aefcd55STheodore Ts'o ei->jinode = NULL; 13502e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1351744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1352b436b9beSJan Kara ei->i_sync_tid = 0; 1353b436b9beSJan Kara ei->i_datasync_tid = 0; 1354e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13552e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1356aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1357aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1358ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1359ac27a0ecSDave Kleikamp } 1360ac27a0ecSDave Kleikamp 13617ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13627ff9c073STheodore Ts'o { 13637ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13647ff9c073STheodore Ts'o 136529b3692eSEric Biggers if (!drop) 136629b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 136729b3692eSEric Biggers 13687ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13697ff9c073STheodore Ts'o return drop; 13707ff9c073STheodore Ts'o } 13717ff9c073STheodore Ts'o 137294053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1373fa0d7e3dSNick Piggin { 13742c58d548SEric Biggers fscrypt_free_inode(inode); 1375aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1376aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1377aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1378aa75f4d3SHarshad Shirwadkar } 1379fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1380fa0d7e3dSNick Piggin } 1381fa0d7e3dSNick Piggin 1382617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1383ac27a0ecSDave Kleikamp { 13849f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1385b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1386b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1387b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13889f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13899f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13909f7dd93dSVasily Averin true); 13919f7dd93dSVasily Averin dump_stack(); 13929f7dd93dSVasily Averin } 13936fed8395SJeffle Xu 13946fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13956fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13966fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13976fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13986fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1399ac27a0ecSDave Kleikamp } 1400ac27a0ecSDave Kleikamp 140151cc5068SAlexey Dobriyan static void init_once(void *foo) 1402ac27a0ecSDave Kleikamp { 1403c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1404ac27a0ecSDave Kleikamp 1405ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1406ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14070e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1408ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1409aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1410ac27a0ecSDave Kleikamp } 1411ac27a0ecSDave Kleikamp 1412e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1413ac27a0ecSDave Kleikamp { 1414f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1415f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1416f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1417f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1418f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1419f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 142020c2df83SPaul Mundt init_once); 1421617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1422ac27a0ecSDave Kleikamp return -ENOMEM; 1423ac27a0ecSDave Kleikamp return 0; 1424ac27a0ecSDave Kleikamp } 1425ac27a0ecSDave Kleikamp 1426ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1427ac27a0ecSDave Kleikamp { 14288c0a8537SKirill A. Shutemov /* 14298c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14308c0a8537SKirill A. Shutemov * destroy cache. 14318c0a8537SKirill A. Shutemov */ 14328c0a8537SKirill A. Shutemov rcu_barrier(); 1433617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1434ac27a0ecSDave Kleikamp } 1435ac27a0ecSDave Kleikamp 14360930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1437ac27a0ecSDave Kleikamp { 1438aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14390930fcc1SAl Viro invalidate_inode_buffers(inode); 1440dbd5768fSJan Kara clear_inode(inode); 144127bc446eSbrookxu ext4_discard_preallocations(inode, 0); 144251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1443f4c2d372SJan Kara dquot_drop(inode); 14448aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14458aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14468aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14478aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14488aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14498aefcd55STheodore Ts'o } 14503d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1451c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1452ac27a0ecSDave Kleikamp } 1453ac27a0ecSDave Kleikamp 14541b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14551b961ac0SChristoph Hellwig u64 ino, u32 generation) 1456ac27a0ecSDave Kleikamp { 1457ac27a0ecSDave Kleikamp struct inode *inode; 1458ac27a0ecSDave Kleikamp 14598a363970STheodore Ts'o /* 1460ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1461ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1462ac27a0ecSDave Kleikamp */ 14638a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14641d1fe1eeSDavid Howells if (IS_ERR(inode)) 14651d1fe1eeSDavid Howells return ERR_CAST(inode); 14661d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1467ac27a0ecSDave Kleikamp iput(inode); 1468ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1469ac27a0ecSDave Kleikamp } 14701b961ac0SChristoph Hellwig 14711b961ac0SChristoph Hellwig return inode; 1472ac27a0ecSDave Kleikamp } 14731b961ac0SChristoph Hellwig 14741b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14751b961ac0SChristoph Hellwig int fh_len, int fh_type) 14761b961ac0SChristoph Hellwig { 14771b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14781b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14791b961ac0SChristoph Hellwig } 14801b961ac0SChristoph Hellwig 14811b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14821b961ac0SChristoph Hellwig int fh_len, int fh_type) 14831b961ac0SChristoph Hellwig { 14841b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14851b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1486ac27a0ecSDave Kleikamp } 1487ac27a0ecSDave Kleikamp 1488fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1489fde87268STheodore Ts'o { 1490fde87268STheodore Ts'o struct writeback_control wbc = { 1491fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1492fde87268STheodore Ts'o }; 1493fde87268STheodore Ts'o 1494fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1495fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1496fde87268STheodore Ts'o } 1497fde87268STheodore Ts'o 1498ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1499d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1500689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1501ac27a0ecSDave Kleikamp 1502617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1503617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1504617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1505617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1506617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15076f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15088c54ca9cSAl Viro const struct path *path); 1509617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1510ac27a0ecSDave Kleikamp size_t len, loff_t off); 1511617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1512ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15137c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15147c319d32SAditya Kali unsigned int flags); 1515ac27a0ecSDave Kleikamp 151696c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 151796c7e0d9SJan Kara { 151896c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 151996c7e0d9SJan Kara } 152096c7e0d9SJan Kara 152161e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 152260e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1523617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1524617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1525617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1526617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1527a5b5ee32SJan Kara .write_info = ext4_write_info, 1528a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1529a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1530040cb378SLi Xi .get_projid = ext4_get_projid, 15317a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1532ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1533ac27a0ecSDave Kleikamp }; 1534ac27a0ecSDave Kleikamp 15350d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1536617ba13bSMingming Cao .quota_on = ext4_quota_on, 1537ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1538287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 15390a240339SJan Kara .get_state = dquot_get_state, 1540287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1541287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 15426332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 15436332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1544ac27a0ecSDave Kleikamp }; 1545ac27a0ecSDave Kleikamp #endif 1546ac27a0ecSDave Kleikamp 1547ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1548617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 154994053139SAl Viro .free_inode = ext4_free_in_core_inode, 1550617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1551617ba13bSMingming Cao .write_inode = ext4_write_inode, 1552617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 15537ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 15540930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1555617ba13bSMingming Cao .put_super = ext4_put_super, 1556617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1557c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1558c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1559617ba13bSMingming Cao .statfs = ext4_statfs, 1560617ba13bSMingming Cao .show_options = ext4_show_options, 1561ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1562617ba13bSMingming Cao .quota_read = ext4_quota_read, 1563617ba13bSMingming Cao .quota_write = ext4_quota_write, 156496c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1565ac27a0ecSDave Kleikamp #endif 1566ac27a0ecSDave Kleikamp }; 1567ac27a0ecSDave Kleikamp 156839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 15691b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 15701b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1571617ba13bSMingming Cao .get_parent = ext4_get_parent, 1572fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1573ac27a0ecSDave Kleikamp }; 1574ac27a0ecSDave Kleikamp 1575ac27a0ecSDave Kleikamp enum { 1576ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1577ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 157872578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 15792d544ec9SYang Xu Opt_user_xattr, Opt_acl, 158072578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1581ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1582ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1583ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 15846ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 15854f74d15fSEric Biggers Opt_inlinecrypt, 1586ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1587ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 15889cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 15899cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1590327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 15914437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 15921449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 15935328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1594744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1595fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1596cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 159721175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1598e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 15998016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 160099c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 16018016e29fSHarshad Shirwadkar #endif 1602ac27a0ecSDave Kleikamp }; 1603ac27a0ecSDave Kleikamp 1604e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1605ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1606ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1607ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1608e5a185c2SLukas Czerner {} 1609e5a185c2SLukas Czerner }; 1610e5a185c2SLukas Czerner 1611e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1612ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1613ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1614ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1615e5a185c2SLukas Czerner {} 1616e5a185c2SLukas Czerner }; 1617e5a185c2SLukas Czerner 1618e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1619e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1620e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1621e5a185c2SLukas Czerner {} 1622e5a185c2SLukas Czerner }; 1623e5a185c2SLukas Czerner 1624e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1625ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1626ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1627ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1628e5a185c2SLukas Czerner {} 1629e5a185c2SLukas Czerner }; 1630e5a185c2SLukas Czerner 1631e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1632e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1633e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1634e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1635e5a185c2SLukas Czerner {} 1636e5a185c2SLukas Czerner }; 1637e5a185c2SLukas Czerner 1638e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1639e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1640e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1641e5a185c2SLukas Czerner 1642e5a185c2SLukas Czerner /* 1643e5a185c2SLukas Czerner * Mount option specification 1644e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1645e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1646e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1647e5a185c2SLukas Czerner * separate for now. 1648e5a185c2SLukas Czerner */ 1649e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1650e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1651e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1652e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1653e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1654e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1655e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1656e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1657e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1658e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1659e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1660e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1661e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1662e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1663e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1664e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1665e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1666e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1667e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1668e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1669e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1670e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1671e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1672e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1673e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1674e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1675e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1676e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1677e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1678e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1679e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1680e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1681e5a185c2SLukas Czerner ext4_param_data_err), 1682e5a185c2SLukas Czerner fsparam_string_empty 1683e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1684e5a185c2SLukas Czerner fsparam_string_empty 1685e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1686e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1687e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1688e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1689e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1690e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1691e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1692e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1693e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1694e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 1695e5a185c2SLukas Czerner fsparam_flag ("i_version", Opt_i_version), 1696e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1697e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1698e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1699e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1700e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1701e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1702e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1703e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1704e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1705e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1706e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1707e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1708e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1709e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1710e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1711e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1712e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1713e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1714e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1715e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1716e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1717e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1718e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1719e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1720e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1721e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1722e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1723e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1724e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1725e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1726e5a185c2SLukas Czerner #endif 1727e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1728e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1729e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1730e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1731e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1732e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1733e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1734e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1735e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1736e5a185c2SLukas Czerner Opt_removed), 1737e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1738e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1739e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1740e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1741e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1742e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1743e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1744e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1745e5a185c2SLukas Czerner {} 1746e5a185c2SLukas Czerner }; 1747e5a185c2SLukas Czerner 1748b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1749196e402aSHarshad Shirwadkar 1750d6006186SEric Biggers static const char deprecated_msg[] = 1751d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1752437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1753b3881f74STheodore Ts'o 175426092bf5STheodore Ts'o #define MOPT_SET 0x0001 175526092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 175626092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 175726092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 175826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 175926092bf5STheodore Ts'o #define MOPT_Q 0 1760ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 176126092bf5STheodore Ts'o #else 176226092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 176326092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 176426092bf5STheodore Ts'o #endif 1765ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1766ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 17678dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1768ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1769ba2e524dSLukas Czerner #define MOPT_2 0x0100 177026092bf5STheodore Ts'o 177126092bf5STheodore Ts'o static const struct mount_opts { 177226092bf5STheodore Ts'o int token; 177326092bf5STheodore Ts'o int mount_opt; 177426092bf5STheodore Ts'o int flags; 177526092bf5STheodore Ts'o } ext4_mount_opts[] = { 177626092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 177726092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 177826092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 177926092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 178026092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 178126092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 17828dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 17838dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 17848dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 17858dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 178626092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 178726092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 17888dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 17898dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17908dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 179159d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1792327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1793327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1794cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1795c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1796c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 17978dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 17981e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 179926092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 18008dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 18011e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 18028dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1803ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 180426092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 180526092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 180626092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 180726092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 180826092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1809ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1810ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1811ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1812ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1813ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 181426092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 181526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 181626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 181726092bf5STheodore Ts'o #else 181826092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 181926092bf5STheodore Ts'o #endif 182026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 182126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 182226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 182326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 182426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 182526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 182626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 182749da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 182849da9392SJan Kara MOPT_SET | MOPT_Q}, 182926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 183049da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 183149da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1832ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1833ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1834ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1835cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 183621175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 18373d392b26STheodore Ts'o MOPT_SET}, 183899c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 18390f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 18400f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 18418016e29fSHarshad Shirwadkar #endif 184226092bf5STheodore Ts'o {Opt_err, 0, 0} 184326092bf5STheodore Ts'o }; 184426092bf5STheodore Ts'o 18455298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1846c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1847c83ad55eSGabriel Krisman Bertazi __u16 magic; 1848c83ad55eSGabriel Krisman Bertazi char *name; 184949bd03ccSChristoph Hellwig unsigned int version; 1850c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 185149bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1852c83ad55eSGabriel Krisman Bertazi }; 1853c83ad55eSGabriel Krisman Bertazi 1854aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1855aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1856c83ad55eSGabriel Krisman Bertazi { 1857c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1858c83ad55eSGabriel Krisman Bertazi int i; 1859c83ad55eSGabriel Krisman Bertazi 1860c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1861c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1862aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1863c83ad55eSGabriel Krisman Bertazi 1864aa8bf298SChristoph Hellwig return NULL; 1865c83ad55eSGabriel Krisman Bertazi } 1866c83ad55eSGabriel Krisman Bertazi #endif 1867c83ad55eSGabriel Krisman Bertazi 18686e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 18696e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 18706e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 18716e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 18726e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 18736e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 18746e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 18756e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 18766e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 18776e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 18786e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 18796e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 18806e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 18816e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 18826e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 18836e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 18846e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 18857edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 188627b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 18876e47a3ccSLukas Czerner 1888461c3af0SLukas Czerner struct ext4_fs_context { 1889e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 189085456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1891e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 18926e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 18936e47a3ccSLukas Czerner int s_fc_debug_max_replay; 18946e47a3ccSLukas Czerner #endif 18956e47a3ccSLukas Czerner unsigned short qname_spec; 18966e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 18976e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 18986e47a3ccSLukas Czerner unsigned long journal_devnum; 18996e47a3ccSLukas Czerner unsigned long s_commit_interval; 19006e47a3ccSLukas Czerner unsigned long s_stripe; 19016e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 19026e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 19036e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 19046e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 19056e47a3ccSLukas Czerner unsigned int journal_ioprio; 19066e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19076e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19086e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19096e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1910e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 1911e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 1912b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19136e47a3ccSLukas Czerner unsigned int spec; 19146e47a3ccSLukas Czerner u32 s_max_batch_time; 19156e47a3ccSLukas Czerner u32 s_min_batch_time; 19166e47a3ccSLukas Czerner kuid_t s_resuid; 19176e47a3ccSLukas Czerner kgid_t s_resgid; 19187edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1919b237e304SHarshad Shirwadkar }; 1920b237e304SHarshad Shirwadkar 1921cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1922cebe85d5SLukas Czerner { 1923cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1924cebe85d5SLukas Czerner int i; 1925cebe85d5SLukas Czerner 1926cebe85d5SLukas Czerner if (!ctx) 1927cebe85d5SLukas Czerner return; 1928cebe85d5SLukas Czerner 1929cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 1930cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 1931cebe85d5SLukas Czerner 193285456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 1933cebe85d5SLukas Czerner kfree(ctx); 1934cebe85d5SLukas Czerner } 1935cebe85d5SLukas Czerner 1936cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 1937cebe85d5SLukas Czerner { 1938da9e4802SDan Carpenter struct ext4_fs_context *ctx; 1939cebe85d5SLukas Czerner 1940cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 1941cebe85d5SLukas Czerner if (!ctx) 1942cebe85d5SLukas Czerner return -ENOMEM; 1943cebe85d5SLukas Czerner 1944cebe85d5SLukas Czerner fc->fs_private = ctx; 1945cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 1946cebe85d5SLukas Czerner 1947cebe85d5SLukas Czerner return 0; 1948cebe85d5SLukas Czerner } 1949cebe85d5SLukas Czerner 1950e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 1951e6e268cbSLukas Czerner /* 1952e6e268cbSLukas Czerner * Note the name of the specified quota file. 1953e6e268cbSLukas Czerner */ 1954e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 1955e6e268cbSLukas Czerner struct fs_parameter *param) 1956e6e268cbSLukas Czerner { 1957e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1958e6e268cbSLukas Czerner char *qname; 1959e6e268cbSLukas Czerner 1960e6e268cbSLukas Czerner if (param->size < 1) { 1961e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 1962e6e268cbSLukas Czerner return -EINVAL; 1963e6e268cbSLukas Czerner } 1964e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 1965e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1966e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 1967e6e268cbSLukas Czerner return -EINVAL; 1968e6e268cbSLukas Czerner } 1969e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 1970e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 1971e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1972e6e268cbSLukas Czerner "%s quota file already specified", 1973e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 1974e6e268cbSLukas Czerner return -EINVAL; 1975e6e268cbSLukas Czerner } 1976e6e268cbSLukas Czerner return 0; 1977e6e268cbSLukas Czerner } 1978e6e268cbSLukas Czerner 1979e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 1980e6e268cbSLukas Czerner if (!qname) { 1981e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1982e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 1983e6e268cbSLukas Czerner return -ENOMEM; 1984e6e268cbSLukas Czerner } 1985e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 1986e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 19876e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 1988e6e268cbSLukas Czerner return 0; 1989e6e268cbSLukas Czerner } 1990e6e268cbSLukas Czerner 1991e6e268cbSLukas Czerner /* 1992e6e268cbSLukas Czerner * Clear the name of the specified quota file. 1993e6e268cbSLukas Czerner */ 1994e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 1995e6e268cbSLukas Czerner { 1996e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1997e6e268cbSLukas Czerner 1998e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 1999e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 2000e6e268cbSLukas Czerner 2001e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 2002e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 20036e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 2004e6e268cbSLukas Czerner return 0; 2005e6e268cbSLukas Czerner } 2006e6e268cbSLukas Czerner #endif 2007e6e268cbSLukas Czerner 200885456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 200985456054SEric Biggers struct ext4_fs_context *ctx) 201085456054SEric Biggers { 201185456054SEric Biggers int err; 201285456054SEric Biggers 201385456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 201485456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 201585456054SEric Biggers "test_dummy_encryption option not supported"); 201685456054SEric Biggers return -EINVAL; 201785456054SEric Biggers } 201885456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 201985456054SEric Biggers &ctx->dummy_enc_policy); 202085456054SEric Biggers if (err == -EINVAL) { 202185456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 202285456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 202385456054SEric Biggers } else if (err == -EEXIST) { 202485456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 202585456054SEric Biggers "Conflicting test_dummy_encryption options"); 202685456054SEric Biggers return -EINVAL; 202785456054SEric Biggers } 202885456054SEric Biggers return err; 202985456054SEric Biggers } 203085456054SEric Biggers 20316e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 20324c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 20334c246728SLukas Czerner unsigned long flag) \ 20346e47a3ccSLukas Czerner { \ 20356e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20366e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2037e3952fccSLukas Czerner } 2038e3952fccSLukas Czerner 2039e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 20404c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 20414c246728SLukas Czerner unsigned long flag) \ 20426e47a3ccSLukas Czerner { \ 20436e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20446e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2045e3952fccSLukas Czerner } 2046e3952fccSLukas Czerner 2047e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 20484c246728SLukas Czerner static inline unsigned long \ 20494c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 20506e47a3ccSLukas Czerner { \ 20514c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2052e3952fccSLukas Czerner } 20536e47a3ccSLukas Czerner 2054e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 20556e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2056e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2057e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 20586e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2059e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2060e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2061e3952fccSLukas Czerner 2062e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2063e3952fccSLukas Czerner { 2064e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2065e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2066e3952fccSLukas Czerner } 20676e47a3ccSLukas Czerner 206802f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 206926092bf5STheodore Ts'o { 2070461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2071461c3af0SLukas Czerner struct fs_parse_result result; 207226092bf5STheodore Ts'o const struct mount_opts *m; 2073461c3af0SLukas Czerner int is_remount; 207408cefc7aSEric W. Biederman kuid_t uid; 207508cefc7aSEric W. Biederman kgid_t gid; 2076461c3af0SLukas Czerner int token; 2077461c3af0SLukas Czerner 2078461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2079461c3af0SLukas Czerner if (token < 0) 2080461c3af0SLukas Czerner return token; 2081461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 208226092bf5STheodore Ts'o 2083ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2084ba2e524dSLukas Czerner if (token == m->token) 2085ba2e524dSLukas Czerner break; 2086ba2e524dSLukas Czerner 2087ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2088ba2e524dSLukas Czerner 2089ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2090ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2091ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2092ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2093ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2094ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2095ba2e524dSLukas Czerner } else 2096ba2e524dSLukas Czerner return -EINVAL; 2097ba2e524dSLukas Czerner } 2098ba2e524dSLukas Czerner 2099ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2100ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2101ba2e524dSLukas Czerner param->key); 2102ba2e524dSLukas Czerner return 0; 2103ba2e524dSLukas Czerner } 2104ba2e524dSLukas Czerner 2105ba2e524dSLukas Czerner switch (token) { 210657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2107ba2e524dSLukas Czerner case Opt_usrjquota: 2108461c3af0SLukas Czerner if (!*param->string) 2109e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2110461c3af0SLukas Czerner else 2111e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2112ba2e524dSLukas Czerner case Opt_grpjquota: 2113461c3af0SLukas Czerner if (!*param->string) 2114e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2115461c3af0SLukas Czerner else 2116e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 211757f73c2cSTheodore Ts'o #endif 211826092bf5STheodore Ts'o case Opt_sb: 21197edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21207edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21217edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21227edfd85bSLukas Czerner } else { 21237edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21247edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21257edfd85bSLukas Czerner } 212602f960f8SLukas Czerner return 0; 212726092bf5STheodore Ts'o case Opt_removed: 2128da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2129461c3af0SLukas Czerner param->key); 213002f960f8SLukas Czerner return 0; 213126092bf5STheodore Ts'o case Opt_abort: 2132e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 213302f960f8SLukas Czerner return 0; 213426092bf5STheodore Ts'o case Opt_i_version: 2135960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, deprecated_msg, param->key, "5.20"); 2136960e0ab6SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Use iversion instead\n"); 21376e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_I_VERSION); 213802f960f8SLukas Czerner return 0; 21394f74d15fSEric Biggers case Opt_inlinecrypt: 21404f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21416e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 21424f74d15fSEric Biggers #else 2143da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 21444f74d15fSEric Biggers #endif 214502f960f8SLukas Czerner return 0; 2146461c3af0SLukas Czerner case Opt_errors: 21476e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2148ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2149ba2e524dSLukas Czerner return 0; 2150ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2151ba2e524dSLukas Czerner case Opt_jqfmt: 2152ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2153ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2154ba2e524dSLukas Czerner return 0; 2155ba2e524dSLukas Czerner #endif 2156ba2e524dSLukas Czerner case Opt_data: 2157ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2158ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2159ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2160ba2e524dSLukas Czerner return 0; 2161ba2e524dSLukas Czerner case Opt_commit: 2162461c3af0SLukas Czerner if (result.uint_32 == 0) 21636e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2164461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2165da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 21669ba55543Szhangyi (F) "Invalid commit interval %d, " 21679ba55543Szhangyi (F) "must be smaller than %d", 2168461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2169da812f61SLukas Czerner return -EINVAL; 21709ba55543Szhangyi (F) } 21716e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 21726e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2173ba2e524dSLukas Czerner return 0; 2174ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 21756e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2176da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2177461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2178da812f61SLukas Czerner return -EINVAL; 21799803387cSTheodore Ts'o } 21806e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 21816e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2182ba2e524dSLukas Czerner return 0; 2183ba2e524dSLukas Czerner case Opt_max_batch_time: 21846e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 21856e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2186ba2e524dSLukas Czerner return 0; 2187ba2e524dSLukas Czerner case Opt_min_batch_time: 21886e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 21896e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2190ba2e524dSLukas Czerner return 0; 2191ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2192461c3af0SLukas Czerner if (result.uint_32 && 2193461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2194461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2195da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2196e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2197e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2198da812f61SLukas Czerner return -EINVAL; 219926092bf5STheodore Ts'o } 22006e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 22016e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2202ba2e524dSLukas Czerner return 0; 2203ba2e524dSLukas Czerner case Opt_init_itable: 22046e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 22056e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2206461c3af0SLukas Czerner if (param->type == fs_value_is_string) 22076e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 22086e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2209ba2e524dSLukas Czerner return 0; 2210ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22116e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22126e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2213ba2e524dSLukas Czerner return 0; 22148016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2215ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22166e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22176e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2218ba2e524dSLukas Czerner return 0; 22198016e29fSHarshad Shirwadkar #endif 2220ba2e524dSLukas Czerner case Opt_stripe: 22216e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22226e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2223ba2e524dSLukas Czerner return 0; 2224ba2e524dSLukas Czerner case Opt_resuid: 2225461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22260efb3b23SJan Kara if (!uid_valid(uid)) { 2227da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2228461c3af0SLukas Czerner result.uint_32); 2229da812f61SLukas Czerner return -EINVAL; 22300efb3b23SJan Kara } 22316e47a3ccSLukas Czerner ctx->s_resuid = uid; 22326e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2233ba2e524dSLukas Czerner return 0; 2234ba2e524dSLukas Czerner case Opt_resgid: 2235461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22360efb3b23SJan Kara if (!gid_valid(gid)) { 2237da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2238461c3af0SLukas Czerner result.uint_32); 2239da812f61SLukas Czerner return -EINVAL; 22400efb3b23SJan Kara } 22416e47a3ccSLukas Czerner ctx->s_resgid = gid; 22426e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2243ba2e524dSLukas Czerner return 0; 2244ba2e524dSLukas Czerner case Opt_journal_dev: 22450efb3b23SJan Kara if (is_remount) { 2246da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22470efb3b23SJan Kara "Cannot specify journal on remount"); 2248da812f61SLukas Czerner return -EINVAL; 22490efb3b23SJan Kara } 2250461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 22516e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2252ba2e524dSLukas Czerner return 0; 2253ba2e524dSLukas Czerner case Opt_journal_path: 2254ba2e524dSLukas Czerner { 2255ad4eec61SEric Sandeen struct inode *journal_inode; 2256ad4eec61SEric Sandeen struct path path; 2257ad4eec61SEric Sandeen int error; 2258ad4eec61SEric Sandeen 2259ad4eec61SEric Sandeen if (is_remount) { 2260da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2261ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2262da812f61SLukas Czerner return -EINVAL; 2263ad4eec61SEric Sandeen } 2264ad4eec61SEric Sandeen 2265461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2266ad4eec61SEric Sandeen if (error) { 2267da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2268461c3af0SLukas Czerner "journal device path"); 2269da812f61SLukas Czerner return -EINVAL; 2270ad4eec61SEric Sandeen } 2271ad4eec61SEric Sandeen 22722b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2273461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 22746e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2275ad4eec61SEric Sandeen path_put(&path); 2276ba2e524dSLukas Czerner return 0; 2277ba2e524dSLukas Czerner } 2278ba2e524dSLukas Czerner case Opt_journal_ioprio: 2279461c3af0SLukas Czerner if (result.uint_32 > 7) { 2280da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 22810efb3b23SJan Kara " (must be 0-7)"); 2282da812f61SLukas Czerner return -EINVAL; 22830efb3b23SJan Kara } 2284461c3af0SLukas Czerner ctx->journal_ioprio = 2285461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 22866e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2287ba2e524dSLukas Czerner return 0; 2288ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 228985456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2290ba2e524dSLukas Czerner case Opt_dax: 2291ba2e524dSLukas Czerner case Opt_dax_type: 2292ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2293ba2e524dSLukas Czerner { 2294ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2295ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2296ba2e524dSLukas Czerner 2297ba2e524dSLukas Czerner switch (type) { 22989cb20f94SIra Weiny case Opt_dax: 22999cb20f94SIra Weiny case Opt_dax_always: 2300ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23016e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23029cb20f94SIra Weiny break; 23039cb20f94SIra Weiny case Opt_dax_never: 2304ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23056e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23069cb20f94SIra Weiny break; 23079cb20f94SIra Weiny case Opt_dax_inode: 23086e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 23096e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 23109cb20f94SIra Weiny /* Strictly for printing options */ 2311ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23129cb20f94SIra Weiny break; 23139cb20f94SIra Weiny } 2314ba2e524dSLukas Czerner return 0; 2315ba2e524dSLukas Czerner } 2316ef83b6e8SDan Williams #else 2317da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2318da812f61SLukas Czerner return -EINVAL; 2319923ae0ffSRoss Zwisler #endif 2320ba2e524dSLukas Czerner case Opt_data_err: 2321ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23226e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2323ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23246e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2325ba2e524dSLukas Czerner return 0; 2326ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 232727b38686SOjaswin Mujoo if (result.int_32 == 1) { 232827b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 232927b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 233027b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 233127b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 233227b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 233327b38686SOjaswin Mujoo } else { 2334da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2335196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2336da812f61SLukas Czerner return -EINVAL; 2337196e402aSHarshad Shirwadkar } 2338ba2e524dSLukas Czerner return 0; 2339ba2e524dSLukas Czerner } 2340ba2e524dSLukas Czerner 2341ba2e524dSLukas Czerner /* 2342ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2343ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2344ba2e524dSLukas Czerner */ 2345ba2e524dSLukas Czerner if (m->token == Opt_err) { 2346ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2347ba2e524dSLukas Czerner param->key); 2348ba2e524dSLukas Czerner WARN_ON(1); 2349ba2e524dSLukas Czerner return -EINVAL; 2350ba2e524dSLukas Czerner } 2351ba2e524dSLukas Czerner 2352ba2e524dSLukas Czerner else { 2353461c3af0SLukas Czerner unsigned int set = 0; 2354461c3af0SLukas Czerner 2355461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2356461c3af0SLukas Czerner result.uint_32 > 0) 2357461c3af0SLukas Czerner set = 1; 2358461c3af0SLukas Czerner 235926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2360461c3af0SLukas Czerner set = !set; 236126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2362da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2363461c3af0SLukas Czerner "buggy handling of option %s", 2364461c3af0SLukas Czerner param->key); 236526092bf5STheodore Ts'o WARN_ON(1); 2366da812f61SLukas Czerner return -EINVAL; 236726092bf5STheodore Ts'o } 2368995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2369461c3af0SLukas Czerner if (set != 0) 23706e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2371995a3ed6SHarshad Shirwadkar else 23726e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2373995a3ed6SHarshad Shirwadkar } else { 2374461c3af0SLukas Czerner if (set != 0) 23756e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 237626092bf5STheodore Ts'o else 23776e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 237826092bf5STheodore Ts'o } 2379995a3ed6SHarshad Shirwadkar } 2380ba2e524dSLukas Czerner 238102f960f8SLukas Czerner return 0; 238226092bf5STheodore Ts'o } 238326092bf5STheodore Ts'o 23847edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2385ac27a0ecSDave Kleikamp { 2386461c3af0SLukas Czerner struct fs_parameter param; 2387461c3af0SLukas Czerner int ret; 2388461c3af0SLukas Czerner char *key; 2389ac27a0ecSDave Kleikamp 2390ac27a0ecSDave Kleikamp if (!options) 23917edfd85bSLukas Czerner return 0; 2392461c3af0SLukas Czerner 2393461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2394461c3af0SLukas Czerner if (*key) { 2395461c3af0SLukas Czerner size_t v_len = 0; 2396461c3af0SLukas Czerner char *value = strchr(key, '='); 2397461c3af0SLukas Czerner 2398461c3af0SLukas Czerner param.type = fs_value_is_flag; 2399461c3af0SLukas Czerner param.string = NULL; 2400461c3af0SLukas Czerner 2401461c3af0SLukas Czerner if (value) { 2402461c3af0SLukas Czerner if (value == key) 2403ac27a0ecSDave Kleikamp continue; 2404461c3af0SLukas Czerner 2405461c3af0SLukas Czerner *value++ = 0; 2406461c3af0SLukas Czerner v_len = strlen(value); 2407461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2408461c3af0SLukas Czerner GFP_KERNEL); 2409461c3af0SLukas Czerner if (!param.string) 24107edfd85bSLukas Czerner return -ENOMEM; 2411461c3af0SLukas Czerner param.type = fs_value_is_string; 2412461c3af0SLukas Czerner } 2413461c3af0SLukas Czerner 2414461c3af0SLukas Czerner param.key = key; 2415461c3af0SLukas Czerner param.size = v_len; 2416461c3af0SLukas Czerner 241702f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2418461c3af0SLukas Czerner if (param.string) 2419461c3af0SLukas Czerner kfree(param.string); 2420461c3af0SLukas Czerner if (ret < 0) 24217edfd85bSLukas Czerner return ret; 2422ac27a0ecSDave Kleikamp } 2423461c3af0SLukas Czerner } 2424461c3af0SLukas Czerner 24257edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2426da812f61SLukas Czerner if (ret < 0) 24277edfd85bSLukas Czerner return ret; 24287edfd85bSLukas Czerner 24297edfd85bSLukas Czerner return 0; 24307edfd85bSLukas Czerner } 24317edfd85bSLukas Czerner 24327edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24337edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24347edfd85bSLukas Czerner { 24357edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24367edfd85bSLukas Czerner char *s_mount_opts = NULL; 24377edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 24387edfd85bSLukas Czerner struct fs_context *fc = NULL; 24397edfd85bSLukas Czerner int ret = -ENOMEM; 24407edfd85bSLukas Czerner 24417edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2442da812f61SLukas Czerner return 0; 2443da812f61SLukas Czerner 24447edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 24457edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 24467edfd85bSLukas Czerner GFP_KERNEL); 24477edfd85bSLukas Czerner if (!s_mount_opts) 24487edfd85bSLukas Czerner return ret; 2449e6e268cbSLukas Czerner 24507edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 24517edfd85bSLukas Czerner if (!fc) 24527edfd85bSLukas Czerner goto out_free; 2453e6e268cbSLukas Czerner 24547edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 24557edfd85bSLukas Czerner if (!s_ctx) 24567edfd85bSLukas Czerner goto out_free; 24577edfd85bSLukas Czerner 24587edfd85bSLukas Czerner fc->fs_private = s_ctx; 24597edfd85bSLukas Czerner fc->s_fs_info = sbi; 24607edfd85bSLukas Czerner 24617edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 24627edfd85bSLukas Czerner if (ret < 0) 24637edfd85bSLukas Czerner goto parse_failed; 24647edfd85bSLukas Czerner 24657edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 24667edfd85bSLukas Czerner if (ret < 0) { 24677edfd85bSLukas Czerner parse_failed: 24687edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 24697edfd85bSLukas Czerner "failed to parse options in superblock: %s", 24707edfd85bSLukas Czerner s_mount_opts); 24717edfd85bSLukas Czerner ret = 0; 24727edfd85bSLukas Czerner goto out_free; 24737edfd85bSLukas Czerner } 24747edfd85bSLukas Czerner 24757edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 24767edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 24777edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 24787edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 24797edfd85bSLukas Czerner 248085456054SEric Biggers ext4_apply_options(fc, sb); 248185456054SEric Biggers ret = 0; 24827edfd85bSLukas Czerner 24837edfd85bSLukas Czerner out_free: 2484c069db76SEric Biggers if (fc) { 2485c069db76SEric Biggers ext4_fc_free(fc); 24867edfd85bSLukas Czerner kfree(fc); 2487c069db76SEric Biggers } 24887edfd85bSLukas Czerner kfree(s_mount_opts); 24897edfd85bSLukas Czerner return ret; 24904c94bff9SLukas Czerner } 24914c94bff9SLukas Czerner 2492e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2493e6e268cbSLukas Czerner struct super_block *sb) 2494e6e268cbSLukas Czerner { 2495e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 24966e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2497e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2498e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2499e6e268cbSLukas Czerner char *qname; 2500e6e268cbSLukas Czerner int i; 2501e6e268cbSLukas Czerner 25026e47a3ccSLukas Czerner if (quota_feature) 25036e47a3ccSLukas Czerner return; 25046e47a3ccSLukas Czerner 25056e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2506e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2507e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2508e6e268cbSLukas Czerner continue; 25096e47a3ccSLukas Czerner 2510e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25114c1bd5a9SLukas Czerner if (qname) 25124c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2513e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 251413b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 251513b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 251613b215a9SLukas Czerner if (qname) 251713b215a9SLukas Czerner kfree_rcu(qname); 2518e6e268cbSLukas Czerner } 25196e47a3ccSLukas Czerner } 25206e47a3ccSLukas Czerner 25216e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25226e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2523e6e268cbSLukas Czerner #endif 2524e6e268cbSLukas Czerner } 2525e6e268cbSLukas Czerner 2526e6e268cbSLukas Czerner /* 2527e6e268cbSLukas Czerner * Check quota settings consistency. 2528e6e268cbSLukas Czerner */ 2529e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2530e6e268cbSLukas Czerner struct super_block *sb) 2531e6e268cbSLukas Czerner { 2532e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2533e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2534e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2535e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2536e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25376e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 25386e47a3ccSLukas Czerner int quota_flags, i; 2539e6e268cbSLukas Czerner 25406e47a3ccSLukas Czerner /* 25416e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 25426e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 25436e47a3ccSLukas Czerner * to support legacy quotas in quota files. 25446e47a3ccSLukas Czerner */ 25456e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 25466e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 25476e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 25486e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 25496e47a3ccSLukas Czerner return -EINVAL; 25506e47a3ccSLukas Czerner } 25516e47a3ccSLukas Czerner 25526e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 25536e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 25546e47a3ccSLukas Czerner if (quota_loaded && 25556e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 25566e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 25576e47a3ccSLukas Czerner goto err_quota_change; 25586e47a3ccSLukas Czerner 25596e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2560e6e268cbSLukas Czerner 2561e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2562e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2563e6e268cbSLukas Czerner continue; 2564e6e268cbSLukas Czerner 25656e47a3ccSLukas Czerner if (quota_loaded && 25666e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2567e6e268cbSLukas Czerner goto err_jquota_change; 2568e6e268cbSLukas Czerner 2569e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 257013b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2571e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2572e6e268cbSLukas Czerner goto err_jquota_specified; 2573e6e268cbSLukas Czerner } 25746e47a3ccSLukas Czerner 25756e47a3ccSLukas Czerner if (quota_feature) { 25766e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 25776e47a3ccSLukas Czerner "Journaled quota options ignored when " 25786e47a3ccSLukas Czerner "QUOTA feature is enabled"); 25796e47a3ccSLukas Czerner return 0; 25806e47a3ccSLukas Czerner } 2581e6e268cbSLukas Czerner } 2582e6e268cbSLukas Czerner 25836e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2584e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 25856e47a3ccSLukas Czerner goto err_jquota_change; 2586e6e268cbSLukas Czerner if (quota_feature) { 2587e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2588e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2589e6e268cbSLukas Czerner return 0; 2590e6e268cbSLukas Czerner } 2591e6e268cbSLukas Czerner } 25926e47a3ccSLukas Czerner 25936e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 25946e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 25956e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 25966e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 25976e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 25986e47a3ccSLukas Czerner 25996e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 26006e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 26016e47a3ccSLukas Czerner 26026e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 26036e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 26046e47a3ccSLukas Czerner 26056e47a3ccSLukas Czerner if (usr_qf_name) { 26066e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 26076e47a3ccSLukas Czerner usrquota = false; 26086e47a3ccSLukas Czerner } 26096e47a3ccSLukas Czerner if (grp_qf_name) { 26106e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26116e47a3ccSLukas Czerner grpquota = false; 26126e47a3ccSLukas Czerner } 26136e47a3ccSLukas Czerner 26146e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26156e47a3ccSLukas Czerner if (usrquota || grpquota) { 26166e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26176e47a3ccSLukas Czerner "format mixing"); 26186e47a3ccSLukas Czerner return -EINVAL; 26196e47a3ccSLukas Czerner } 26206e47a3ccSLukas Czerner 26216e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26226e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26236e47a3ccSLukas Czerner "not specified"); 26246e47a3ccSLukas Czerner return -EINVAL; 26256e47a3ccSLukas Czerner } 26266e47a3ccSLukas Czerner } 26276e47a3ccSLukas Czerner 2628e6e268cbSLukas Czerner return 0; 2629e6e268cbSLukas Czerner 2630e6e268cbSLukas Czerner err_quota_change: 2631e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2632e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2633e6e268cbSLukas Czerner return -EINVAL; 2634e6e268cbSLukas Czerner err_jquota_change: 2635e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2636e6e268cbSLukas Czerner "options when quota turned on"); 2637e6e268cbSLukas Czerner return -EINVAL; 2638e6e268cbSLukas Czerner err_jquota_specified: 2639e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2640e6e268cbSLukas Czerner QTYPE2NAME(i)); 2641e6e268cbSLukas Czerner return -EINVAL; 2642e6e268cbSLukas Czerner #else 2643e6e268cbSLukas Czerner return 0; 2644e6e268cbSLukas Czerner #endif 2645e6e268cbSLukas Czerner } 2646e6e268cbSLukas Czerner 26475f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 26485f41fdaeSEric Biggers struct super_block *sb) 26495f41fdaeSEric Biggers { 26505f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 26515f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 265285456054SEric Biggers int err; 26535f41fdaeSEric Biggers 265485456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 26555f41fdaeSEric Biggers return 0; 26565f41fdaeSEric Biggers 26575f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 26585f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 26595f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 26605f41fdaeSEric Biggers return -EINVAL; 26615f41fdaeSEric Biggers } 26625f41fdaeSEric Biggers /* 26635f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 26645f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 26655f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 26665f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 26675f41fdaeSEric Biggers */ 266885456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 266985456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 267085456054SEric Biggers &ctx->dummy_enc_policy)) 267185456054SEric Biggers return 0; 26725f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 267385456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 26745f41fdaeSEric Biggers return -EINVAL; 26755f41fdaeSEric Biggers } 267685456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 267785456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 267885456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 267985456054SEric Biggers &ctx->dummy_enc_policy)) 26805f41fdaeSEric Biggers return 0; 268185456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 268285456054SEric Biggers "Conflicting test_dummy_encryption options"); 268385456054SEric Biggers return -EINVAL; 268485456054SEric Biggers } 268585456054SEric Biggers /* 268685456054SEric Biggers * fscrypt_add_test_dummy_key() technically changes the super_block, so 268785456054SEric Biggers * technically it should be delayed until ext4_apply_options() like the 268885456054SEric Biggers * other changes. But since we never get here for remounts (see above), 268985456054SEric Biggers * and this is the last chance to report errors, we do it here. 269085456054SEric Biggers */ 269185456054SEric Biggers err = fscrypt_add_test_dummy_key(sb, &ctx->dummy_enc_policy); 269285456054SEric Biggers if (err) 269385456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 269485456054SEric Biggers "Error adding test dummy encryption key [%d]", err); 269585456054SEric Biggers return err; 269685456054SEric Biggers } 269785456054SEric Biggers 269885456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 269985456054SEric Biggers struct super_block *sb) 270085456054SEric Biggers { 270185456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 270285456054SEric Biggers /* if already set, it was already verified to be the same */ 270385456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 270485456054SEric Biggers return; 270585456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 270685456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 270785456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 27085f41fdaeSEric Biggers } 27095f41fdaeSEric Biggers 2710b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2711b6bd2435SLukas Czerner struct super_block *sb) 2712b6bd2435SLukas Czerner { 2713b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27146e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27156e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27165f41fdaeSEric Biggers int err; 2717b6bd2435SLukas Czerner 2718b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2719b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2720b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2721b6bd2435SLukas Czerner return -EINVAL; 2722b6bd2435SLukas Czerner } 2723b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2724b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2725b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2726b6bd2435SLukas Czerner return -EINVAL; 2727b6bd2435SLukas Czerner } 2728b6bd2435SLukas Czerner 27296e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27306e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27316e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27326e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27336e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27346e47a3ccSLukas Czerner return -EINVAL; 27356e47a3ccSLukas Czerner } 27366e47a3ccSLukas Czerner 27376e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 27386e47a3ccSLukas Czerner int blocksize = 27396e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 27406e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 27416e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 27426e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 27436e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 27446e47a3ccSLukas Czerner } 27456e47a3ccSLukas Czerner 27465f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27475f41fdaeSEric Biggers if (err) 27485f41fdaeSEric Biggers return err; 27496e47a3ccSLukas Czerner 27506e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 27516e47a3ccSLukas Czerner if (!sbi->s_journal) { 27526e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 27536e47a3ccSLukas Czerner "Remounting file system with no journal " 27546e47a3ccSLukas Czerner "so ignoring journalled data option"); 27556e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 27564c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 27574c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 27586e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 27596e47a3ccSLukas Czerner "on remount"); 27606e47a3ccSLukas Czerner return -EINVAL; 27616e47a3ccSLukas Czerner } 27626e47a3ccSLukas Czerner } 27636e47a3ccSLukas Czerner 27646e47a3ccSLukas Czerner if (is_remount) { 27656e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27666e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 27676e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 27686e47a3ccSLukas Czerner "both data=journal and dax"); 27696e47a3ccSLukas Czerner return -EINVAL; 27706e47a3ccSLukas Czerner } 27716e47a3ccSLukas Czerner 27726e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27736e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27746e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 27756e47a3ccSLukas Czerner fail_dax_change_remount: 27766e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 27776e47a3ccSLukas Czerner "dax mount option while remounting"); 27786e47a3ccSLukas Czerner return -EINVAL; 27796e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 27806e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 27816e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 27826e47a3ccSLukas Czerner goto fail_dax_change_remount; 27836e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 27846e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27856e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 27866e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 27876e47a3ccSLukas Czerner goto fail_dax_change_remount; 27886e47a3ccSLukas Czerner } 27896e47a3ccSLukas Czerner } 27906e47a3ccSLukas Czerner 2791b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2792b6bd2435SLukas Czerner } 2793b6bd2435SLukas Czerner 279485456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 27956e47a3ccSLukas Czerner { 27966e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27976e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27986e47a3ccSLukas Czerner 27996e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 28006e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 28016e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 28026e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 28036e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 28046e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 28056e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 28066e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 28076e47a3ccSLukas Czerner 2808960e0ab6SLukas Czerner /* 2809960e0ab6SLukas Czerner * i_version differs from common mount option iversion so we have 2810960e0ab6SLukas Czerner * to let vfs know that it was set, otherwise it would get cleared 2811960e0ab6SLukas Czerner * on remount 2812960e0ab6SLukas Czerner */ 2813960e0ab6SLukas Czerner if (ctx->mask_s_flags & SB_I_VERSION) 2814960e0ab6SLukas Czerner fc->sb_flags |= SB_I_VERSION; 2815960e0ab6SLukas Czerner 28166e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 28176e47a3ccSLukas Czerner APPLY(s_commit_interval); 28186e47a3ccSLukas Czerner APPLY(s_stripe); 28196e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28206e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28216e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28226e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28236e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28246e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28256e47a3ccSLukas Czerner APPLY(s_resgid); 28266e47a3ccSLukas Czerner APPLY(s_resuid); 28276e47a3ccSLukas Czerner 28286e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28296e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28306e47a3ccSLukas Czerner #endif 28316e47a3ccSLukas Czerner 28326e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 283385456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28346e47a3ccSLukas Czerner } 28356e47a3ccSLukas Czerner 28366e47a3ccSLukas Czerner 2837da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28384c94bff9SLukas Czerner { 2839ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28406e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28414c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28426e47a3ccSLukas Czerner 28436e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28446e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28456e47a3ccSLukas Czerner 284633458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28476e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28486e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2849ac27a0ecSDave Kleikamp 28506e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28516e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2852ac27a0ecSDave Kleikamp 28536e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28546e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2855da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2856b31e1552SEric Sandeen "format mixing"); 2857da812f61SLukas Czerner return -EINVAL; 2858ac27a0ecSDave Kleikamp } 2859ac27a0ecSDave Kleikamp } 2860ac27a0ecSDave Kleikamp #endif 28616e47a3ccSLukas Czerner return 1; 2862ac27a0ecSDave Kleikamp } 2863ac27a0ecSDave Kleikamp 28642adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 28652adf6da8STheodore Ts'o struct super_block *sb) 28662adf6da8STheodore Ts'o { 28672adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 28682adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 286933458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 28702adf6da8STheodore Ts'o 28712adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 28722adf6da8STheodore Ts'o char *fmtname = ""; 28732adf6da8STheodore Ts'o 28742adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 28752adf6da8STheodore Ts'o case QFMT_VFS_OLD: 28762adf6da8STheodore Ts'o fmtname = "vfsold"; 28772adf6da8STheodore Ts'o break; 28782adf6da8STheodore Ts'o case QFMT_VFS_V0: 28792adf6da8STheodore Ts'o fmtname = "vfsv0"; 28802adf6da8STheodore Ts'o break; 28812adf6da8STheodore Ts'o case QFMT_VFS_V1: 28822adf6da8STheodore Ts'o fmtname = "vfsv1"; 28832adf6da8STheodore Ts'o break; 28842adf6da8STheodore Ts'o } 28852adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 28862adf6da8STheodore Ts'o } 28872adf6da8STheodore Ts'o 288833458eabSTheodore Ts'o rcu_read_lock(); 288933458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 289033458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 289133458eabSTheodore Ts'o if (usr_qf_name) 289233458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 289333458eabSTheodore Ts'o if (grp_qf_name) 289433458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 289533458eabSTheodore Ts'o rcu_read_unlock(); 28962adf6da8STheodore Ts'o #endif 28972adf6da8STheodore Ts'o } 28982adf6da8STheodore Ts'o 28995a916be1STheodore Ts'o static const char *token2str(int token) 29005a916be1STheodore Ts'o { 290197d8a670SLukas Czerner const struct fs_parameter_spec *spec; 29025a916be1STheodore Ts'o 290397d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 290497d8a670SLukas Czerner if (spec->opt == token && !spec->type) 29055a916be1STheodore Ts'o break; 290697d8a670SLukas Czerner return spec->name; 29075a916be1STheodore Ts'o } 29085a916be1STheodore Ts'o 29092adf6da8STheodore Ts'o /* 29102adf6da8STheodore Ts'o * Show an option if 29112adf6da8STheodore Ts'o * - it's set to a non-default value OR 29122adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 29132adf6da8STheodore Ts'o */ 291466acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 291566acdcf4STheodore Ts'o int nodefs) 29162adf6da8STheodore Ts'o { 29172adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 29182adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 291968afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 29205a916be1STheodore Ts'o const struct mount_opts *m; 292166acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29222adf6da8STheodore Ts'o 292366acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 292466acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29252adf6da8STheodore Ts'o 29262adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29275a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29285a916be1STheodore Ts'o 29295a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29305a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 29315a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2932ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29335a916be1STheodore Ts'o continue; 293468afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 29355a916be1STheodore Ts'o continue; /* skip if same as the default */ 29365a916be1STheodore Ts'o if ((want_set && 29375a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 29385a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 29395a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 29405a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29415a916be1STheodore Ts'o } 29425a916be1STheodore Ts'o 294308cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29445a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 294508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 294608cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 294708cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 29485a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 294908cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 295008cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 295166acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 29525a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 29535a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 29542adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 29555a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 29562adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 29575a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 295866acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 29595a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 296066acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 29615a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 296266acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 29635a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2964357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 29655a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 296666acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 29675a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 296868afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 296968afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 29702adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29715a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 29722adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29735a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 29742adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 29755a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 29765a916be1STheodore Ts'o } 297766acdcf4STheodore Ts'o if (nodefs || 297866acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 29795a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 29802adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 29812adf6da8STheodore Ts'o 2982ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 298366acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 29845a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2985df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2986df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 29877915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 29887915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2989ed318a6cSEric Biggers 2990ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 29912adf6da8STheodore Ts'o 29924f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 29934f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 29944f74d15fSEric Biggers 29959cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 29969cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 29979cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 29989cb20f94SIra Weiny else 29999cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 30009cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 30019cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 30029cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 30039cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 30049cb20f94SIra Weiny } 30053fa5d23eSOjaswin Mujoo 30063fa5d23eSOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30073fa5d23eSOjaswin Mujoo !test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30083fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=0"); 30093fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 30103fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 30113fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 30123fa5d23eSOjaswin Mujoo } 30133fa5d23eSOjaswin Mujoo 30142adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 30152adf6da8STheodore Ts'o return 0; 30162adf6da8STheodore Ts'o } 30172adf6da8STheodore Ts'o 301866acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 301966acdcf4STheodore Ts'o { 302066acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 302166acdcf4STheodore Ts'o } 302266acdcf4STheodore Ts'o 3023ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 302466acdcf4STheodore Ts'o { 302566acdcf4STheodore Ts'o struct super_block *sb = seq->private; 302666acdcf4STheodore Ts'o int rc; 302766acdcf4STheodore Ts'o 3028bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 302966acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 303066acdcf4STheodore Ts'o seq_puts(seq, "\n"); 303166acdcf4STheodore Ts'o return rc; 303266acdcf4STheodore Ts'o } 303366acdcf4STheodore Ts'o 3034617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3035ac27a0ecSDave Kleikamp int read_only) 3036ac27a0ecSDave Kleikamp { 3037617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3038c89128a0SJaegeuk Kim int err = 0; 3039ac27a0ecSDave Kleikamp 3040617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3041b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3042b31e1552SEric Sandeen "forcing read-only mode"); 3043c89128a0SJaegeuk Kim err = -EROFS; 30445adaccacSyangerkun goto done; 3045ac27a0ecSDave Kleikamp } 3046ac27a0ecSDave Kleikamp if (read_only) 3047281b5995STheodore Ts'o goto done; 3048617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3049b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3050b31e1552SEric Sandeen "running e2fsck is recommended"); 3051c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3052b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3053b31e1552SEric Sandeen "warning: mounting fs with errors, " 3054b31e1552SEric Sandeen "running e2fsck is recommended"); 3055ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3056ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3057ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3058b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3059b31e1552SEric Sandeen "warning: maximal mount count reached, " 3060b31e1552SEric Sandeen "running e2fsck is recommended"); 3061ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 30626a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 30636a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3064b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3065b31e1552SEric Sandeen "warning: checktime reached, " 3066b31e1552SEric Sandeen "running e2fsck is recommended"); 30670390131bSFrank Mayhar if (!sbi->s_journal) 3068216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3069ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3070617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3071e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 30726a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 307302f310fcSJan Kara if (sbi->s_journal) { 3074e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 307502f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 307602f310fcSJan Kara ext4_set_feature_orphan_present(sb); 307702f310fcSJan Kara } 3078ac27a0ecSDave Kleikamp 30794392fbc4SJan Kara err = ext4_commit_super(sb); 3080281b5995STheodore Ts'o done: 3081ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3082a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3083a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3084ac27a0ecSDave Kleikamp sb->s_blocksize, 3085ac27a0ecSDave Kleikamp sbi->s_groups_count, 3086617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3087617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3088a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3089c89128a0SJaegeuk Kim return err; 3090ac27a0ecSDave Kleikamp } 3091ac27a0ecSDave Kleikamp 3092117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3093117fff10STheodore Ts'o { 3094117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30957c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 309637b0b6b8SDan Carpenter int size, i, j; 3097117fff10STheodore Ts'o 3098117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3099117fff10STheodore Ts'o return 0; 3100117fff10STheodore Ts'o 3101117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3102117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3103117fff10STheodore Ts'o return 0; 3104117fff10STheodore Ts'o 31057c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 31067c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3107117fff10STheodore Ts'o if (!new_groups) { 31087c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31097c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3110117fff10STheodore Ts'o return -ENOMEM; 3111117fff10STheodore Ts'o } 31127c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 31137c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 31147c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 31157c990728SSuraj Jitindar Singh GFP_KERNEL); 31167c990728SSuraj Jitindar Singh if (!new_groups[i]) { 311737b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 311837b0b6b8SDan Carpenter kvfree(new_groups[j]); 31197c990728SSuraj Jitindar Singh kvfree(new_groups); 31207c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31217c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31227c990728SSuraj Jitindar Singh return -ENOMEM; 3123117fff10STheodore Ts'o } 31247c990728SSuraj Jitindar Singh } 31257c990728SSuraj Jitindar Singh rcu_read_lock(); 31267c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31277c990728SSuraj Jitindar Singh if (old_groups) 31287c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31297c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31307c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31317c990728SSuraj Jitindar Singh rcu_read_unlock(); 31327c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31337c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31347c990728SSuraj Jitindar Singh if (old_groups) 31357c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3136117fff10STheodore Ts'o return 0; 3137117fff10STheodore Ts'o } 3138117fff10STheodore Ts'o 3139772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3140772cb7c8SJose R. Santos { 3141772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3142772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31437c990728SSuraj Jitindar Singh struct flex_groups *fg; 3144772cb7c8SJose R. Santos ext4_group_t flex_group; 3145117fff10STheodore Ts'o int i, err; 3146772cb7c8SJose R. Santos 3147503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3148d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3149772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3150772cb7c8SJose R. Santos return 1; 3151772cb7c8SJose R. Santos } 3152772cb7c8SJose R. Santos 3153117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3154117fff10STheodore Ts'o if (err) 3155772cb7c8SJose R. Santos goto failed; 3156772cb7c8SJose R. Santos 3157772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 315888b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3159772cb7c8SJose R. Santos 3160772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 31617c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 31627c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 316390ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 31647c990728SSuraj Jitindar Singh &fg->free_clusters); 31657c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3166772cb7c8SJose R. Santos } 3167772cb7c8SJose R. Santos 3168772cb7c8SJose R. Santos return 1; 3169772cb7c8SJose R. Santos failed: 3170772cb7c8SJose R. Santos return 0; 3171772cb7c8SJose R. Santos } 3172772cb7c8SJose R. Santos 3173e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3174717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3175717d50e4SAndreas Dilger { 3176b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3177717d50e4SAndreas Dilger __u16 crc = 0; 3178717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3179e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3180717d50e4SAndreas Dilger 31819aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3182feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3183feb0ab32SDarrick J. Wong __u32 csum32; 3184b47820edSDaeho Jeong __u16 dummy_csum = 0; 3185feb0ab32SDarrick J. Wong 3186feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3187feb0ab32SDarrick J. Wong sizeof(le_group)); 3188b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3189b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3190b47820edSDaeho Jeong sizeof(dummy_csum)); 3191b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3192b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3193b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3194b47820edSDaeho Jeong sbi->s_desc_size - offset); 3195feb0ab32SDarrick J. Wong 3196feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3197feb0ab32SDarrick J. Wong goto out; 3198feb0ab32SDarrick J. Wong } 3199feb0ab32SDarrick J. Wong 3200feb0ab32SDarrick J. Wong /* old crc16 code */ 3201e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3202813d32f9SDarrick J. Wong return 0; 3203813d32f9SDarrick J. Wong 3204717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3205717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3206717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3207717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3208717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3209e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3210717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3211717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3212717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3213717d50e4SAndreas Dilger offset); 3214717d50e4SAndreas Dilger 3215feb0ab32SDarrick J. Wong out: 3216717d50e4SAndreas Dilger return cpu_to_le16(crc); 3217717d50e4SAndreas Dilger } 3218717d50e4SAndreas Dilger 3219feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3220717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3221717d50e4SAndreas Dilger { 3222feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3223e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3224717d50e4SAndreas Dilger return 0; 3225717d50e4SAndreas Dilger 3226717d50e4SAndreas Dilger return 1; 3227717d50e4SAndreas Dilger } 3228717d50e4SAndreas Dilger 3229feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3230feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3231feb0ab32SDarrick J. Wong { 3232feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3233feb0ab32SDarrick J. Wong return; 3234e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3235feb0ab32SDarrick J. Wong } 3236feb0ab32SDarrick J. Wong 3237ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3238bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3239829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3240bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3241ac27a0ecSDave Kleikamp { 3242617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3243617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3244617ba13bSMingming Cao ext4_fsblk_t last_block; 324544de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3246bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3247bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3248bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3249ce421581SJose R. Santos int flexbg_flag = 0; 3250bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3251ac27a0ecSDave Kleikamp 3252e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3253ce421581SJose R. Santos flexbg_flag = 1; 3254ce421581SJose R. Santos 3255617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3256ac27a0ecSDave Kleikamp 3257197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3258197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3259197cd65aSAkinobu Mita 3260ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3261bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3262ac27a0ecSDave Kleikamp else 3263ac27a0ecSDave Kleikamp last_block = first_block + 3264617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3265ac27a0ecSDave Kleikamp 3266bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3267bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3268bfff6873SLukas Czerner grp = i; 3269bfff6873SLukas Czerner 32708fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3271829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3272829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3273829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3274829fa70dSTheodore Ts'o "superblock", i); 327518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 327618db4b4eSTheodore Ts'o return 0; 3277829fa70dSTheodore Ts'o } 327877260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 327977260807STheodore Ts'o block_bitmap <= last_bg_block) { 328077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 328177260807STheodore Ts'o "Block bitmap for group %u overlaps " 328277260807STheodore Ts'o "block group descriptors", i); 328377260807STheodore Ts'o if (!sb_rdonly(sb)) 328477260807STheodore Ts'o return 0; 328577260807STheodore Ts'o } 32862b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3287b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3288a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3289b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3290ac27a0ecSDave Kleikamp return 0; 3291ac27a0ecSDave Kleikamp } 32928fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3293829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3294829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3295829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3296829fa70dSTheodore Ts'o "superblock", i); 329718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 329818db4b4eSTheodore Ts'o return 0; 3299829fa70dSTheodore Ts'o } 330077260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 330177260807STheodore Ts'o inode_bitmap <= last_bg_block) { 330277260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 330377260807STheodore Ts'o "Inode bitmap for group %u overlaps " 330477260807STheodore Ts'o "block group descriptors", i); 330577260807STheodore Ts'o if (!sb_rdonly(sb)) 330677260807STheodore Ts'o return 0; 330777260807STheodore Ts'o } 33082b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3309b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3310a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3311b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3312ac27a0ecSDave Kleikamp return 0; 3313ac27a0ecSDave Kleikamp } 33148fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3315829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3316829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3317829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3318829fa70dSTheodore Ts'o "superblock", i); 331918db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 332018db4b4eSTheodore Ts'o return 0; 3321829fa70dSTheodore Ts'o } 332277260807STheodore Ts'o if (inode_table >= sb_block + 1 && 332377260807STheodore Ts'o inode_table <= last_bg_block) { 332477260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 332577260807STheodore Ts'o "Inode table for group %u overlaps " 332677260807STheodore Ts'o "block group descriptors", i); 332777260807STheodore Ts'o if (!sb_rdonly(sb)) 332877260807STheodore Ts'o return 0; 332977260807STheodore Ts'o } 3330bd81d8eeSLaurent Vivier if (inode_table < first_block || 33312b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3332b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3333a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3334b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3335ac27a0ecSDave Kleikamp return 0; 3336ac27a0ecSDave Kleikamp } 3337955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3338feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3339b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3340b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3341e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3342fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3343bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3344955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3345717d50e4SAndreas Dilger return 0; 3346717d50e4SAndreas Dilger } 33477ee1ec4cSLi Zefan } 3348955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3349ce421581SJose R. Santos if (!flexbg_flag) 3350617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3351ac27a0ecSDave Kleikamp } 3352bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3353bfff6873SLukas Czerner *first_not_zeroed = grp; 3354ac27a0ecSDave Kleikamp return 1; 3355ac27a0ecSDave Kleikamp } 3356ac27a0ecSDave Kleikamp 3357cd2291a4SEric Sandeen /* 3358cd2291a4SEric Sandeen * Maximal extent format file size. 3359cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3360cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3361cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3362cd2291a4SEric Sandeen * so that won't be a limiting factor. 3363cd2291a4SEric Sandeen * 3364f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3365f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3366f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3367f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3368f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3369f17722f9SLukas Czerner * 3370cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3371cd2291a4SEric Sandeen */ 3372f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3373cd2291a4SEric Sandeen { 3374cd2291a4SEric Sandeen loff_t res; 3375cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3376cd2291a4SEric Sandeen 337772deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 337872deb455SChristoph Hellwig 337972deb455SChristoph Hellwig if (!has_huge_files) { 3380cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3381cd2291a4SEric Sandeen 3382cd2291a4SEric Sandeen /* total blocks in file system block size */ 3383cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3384cd2291a4SEric Sandeen upper_limit <<= blkbits; 3385cd2291a4SEric Sandeen } 3386cd2291a4SEric Sandeen 3387f17722f9SLukas Czerner /* 3388f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3389f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3390f17722f9SLukas Czerner * size 3391f17722f9SLukas Czerner */ 3392f17722f9SLukas Czerner res = (1LL << 32) - 1; 3393cd2291a4SEric Sandeen res <<= blkbits; 3394cd2291a4SEric Sandeen 3395cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3396cd2291a4SEric Sandeen if (res > upper_limit) 3397cd2291a4SEric Sandeen res = upper_limit; 3398cd2291a4SEric Sandeen 3399cd2291a4SEric Sandeen return res; 3400cd2291a4SEric Sandeen } 3401ac27a0ecSDave Kleikamp 3402ac27a0ecSDave Kleikamp /* 3403cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 34040fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 34050fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3406ac27a0ecSDave Kleikamp */ 3407f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3408ac27a0ecSDave Kleikamp { 34095c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 34100fc1b451SAneesh Kumar K.V int meta_blocks; 34115c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 341275ca6ad4SRitesh Harjani 341375ca6ad4SRitesh Harjani /* 341475ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 34150b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 34160b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 34170b8e58a1SAndreas Dilger * 34180b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 34190b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 34200fc1b451SAneesh Kumar K.V */ 342172deb455SChristoph Hellwig if (!has_huge_files) { 34220fc1b451SAneesh Kumar K.V /* 342372deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 342472deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 342572deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34260fc1b451SAneesh Kumar K.V */ 34270fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34280fc1b451SAneesh Kumar K.V 34290fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34300fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34310fc1b451SAneesh Kumar K.V 34320fc1b451SAneesh Kumar K.V } else { 34338180a562SAneesh Kumar K.V /* 34348180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34358180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34368180a562SAneesh Kumar K.V * represent total number of blocks in 34378180a562SAneesh Kumar K.V * file system block size 34388180a562SAneesh Kumar K.V */ 34390fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34400fc1b451SAneesh Kumar K.V 34410fc1b451SAneesh Kumar K.V } 34420fc1b451SAneesh Kumar K.V 34435c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34445c93e8ecSZhang Yi res += ppb; 34455c93e8ecSZhang Yi res += ppb * ppb; 34465c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34475c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34485c93e8ecSZhang Yi meta_blocks = 1; 34495c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34505c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 34515c93e8ecSZhang Yi /* Does block tree limit file size? */ 34525c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 34535c93e8ecSZhang Yi goto check_lfs; 34545c93e8ecSZhang Yi 34555c93e8ecSZhang Yi res = upper_limit; 34565c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 34575c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 34580fc1b451SAneesh Kumar K.V /* indirect blocks */ 34590fc1b451SAneesh Kumar K.V meta_blocks = 1; 34605c93e8ecSZhang Yi upper_limit -= ppb; 34610fc1b451SAneesh Kumar K.V /* double indirect blocks */ 34625c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 34635c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 34645c93e8ecSZhang Yi res -= meta_blocks; 34655c93e8ecSZhang Yi goto check_lfs; 34665c93e8ecSZhang Yi } 34675c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34685c93e8ecSZhang Yi upper_limit -= ppb * ppb; 34695c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 34705c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 34715c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 34725c93e8ecSZhang Yi res -= meta_blocks; 34735c93e8ecSZhang Yi check_lfs: 3474ac27a0ecSDave Kleikamp res <<= bits; 34750fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 34760fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 34770fc1b451SAneesh Kumar K.V 34785c93e8ecSZhang Yi return res; 3479ac27a0ecSDave Kleikamp } 3480ac27a0ecSDave Kleikamp 3481617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 348270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3483ac27a0ecSDave Kleikamp { 3484617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3485fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3486ac27a0ecSDave Kleikamp int has_super = 0; 3487ac27a0ecSDave Kleikamp 3488ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3489ac27a0ecSDave Kleikamp 3490e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 349170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3492ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3493617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3494ac27a0ecSDave Kleikamp has_super = 1; 34950b8e58a1SAndreas Dilger 3496bd63f6b0SDarrick J. Wong /* 3497bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3498bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3499bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3500bd63f6b0SDarrick J. Wong * compensate. 3501bd63f6b0SDarrick J. Wong */ 3502bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 350349598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3504bd63f6b0SDarrick J. Wong has_super++; 3505bd63f6b0SDarrick J. Wong 3506617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3507ac27a0ecSDave Kleikamp } 3508ac27a0ecSDave Kleikamp 3509c9de560dSAlex Tomas /** 3510c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3511c9de560dSAlex Tomas * @sbi: In memory super block info 3512c9de560dSAlex Tomas * 3513c9de560dSAlex Tomas * If we have specified it via mount option, then 3514c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3515c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3516c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3517c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3518c9de560dSAlex Tomas * 3519c9de560dSAlex Tomas */ 3520c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3521c9de560dSAlex Tomas { 3522c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3523c9de560dSAlex Tomas unsigned long stripe_width = 3524c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35253eb08658SDan Ehrenberg int ret; 3526c9de560dSAlex Tomas 3527c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35283eb08658SDan Ehrenberg ret = sbi->s_stripe; 35295469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35303eb08658SDan Ehrenberg ret = stripe_width; 35315469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35323eb08658SDan Ehrenberg ret = stride; 35333eb08658SDan Ehrenberg else 35343eb08658SDan Ehrenberg ret = 0; 3535c9de560dSAlex Tomas 35363eb08658SDan Ehrenberg /* 35373eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35383eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35393eb08658SDan Ehrenberg */ 35403eb08658SDan Ehrenberg if (ret <= 1) 35413eb08658SDan Ehrenberg ret = 0; 3542c9de560dSAlex Tomas 35433eb08658SDan Ehrenberg return ret; 3544c9de560dSAlex Tomas } 3545ac27a0ecSDave Kleikamp 3546a13fb1a4SEric Sandeen /* 3547a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3548a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3549a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3550a13fb1a4SEric Sandeen * 0 if it cannot be. 3551a13fb1a4SEric Sandeen */ 355225c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3553a13fb1a4SEric Sandeen { 3554e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3555a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3556a13fb1a4SEric Sandeen "Couldn't mount because of " 3557a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3558a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3559a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3560a13fb1a4SEric Sandeen return 0; 3561a13fb1a4SEric Sandeen } 3562a13fb1a4SEric Sandeen 35635298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3564c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3565c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3566c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3567c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3568c83ad55eSGabriel Krisman Bertazi return 0; 3569c83ad55eSGabriel Krisman Bertazi } 3570c83ad55eSGabriel Krisman Bertazi #endif 3571c83ad55eSGabriel Krisman Bertazi 3572a13fb1a4SEric Sandeen if (readonly) 3573a13fb1a4SEric Sandeen return 1; 3574a13fb1a4SEric Sandeen 3575e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 35762cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 35771751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 35782cb5cc8bSDarrick J. Wong return 1; 35792cb5cc8bSDarrick J. Wong } 35802cb5cc8bSDarrick J. Wong 3581a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3582e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3583a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3584a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3585a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3586a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3587a13fb1a4SEric Sandeen return 0; 3588a13fb1a4SEric Sandeen } 3589e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3590bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3591bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3592bab08ab9STheodore Ts'o "extents feature\n"); 3593bab08ab9STheodore Ts'o return 0; 3594bab08ab9STheodore Ts'o } 35957c319d32SAditya Kali 35969db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3597d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3598d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 35997c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3600d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3601689c958cSLi Xi return 0; 3602689c958cSLi Xi } 36037c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3604a13fb1a4SEric Sandeen return 1; 3605a13fb1a4SEric Sandeen } 3606a13fb1a4SEric Sandeen 360766e61a9eSTheodore Ts'o /* 360866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 360966e61a9eSTheodore Ts'o * on the file system 361066e61a9eSTheodore Ts'o */ 3611235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 361266e61a9eSTheodore Ts'o { 3613235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3614235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3615235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 361666e61a9eSTheodore Ts'o 361766e61a9eSTheodore Ts'o if (es->s_error_count) 3618ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3619ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 362066e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 362166e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36226a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36236a0678a7SArnd Bergmann sb->s_id, 36246a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 362566e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 362666e61a9eSTheodore Ts'o es->s_first_error_func, 362766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 362866e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3629651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 363066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 363166e61a9eSTheodore Ts'o if (es->s_first_error_block) 3632651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 363366e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3634651e1c3bSJoe Perches printk(KERN_CONT "\n"); 363566e61a9eSTheodore Ts'o } 363666e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36376a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36386a0678a7SArnd Bergmann sb->s_id, 36396a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 364066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 364166e61a9eSTheodore Ts'o es->s_last_error_func, 364266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 364366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3644651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 364566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 364666e61a9eSTheodore Ts'o if (es->s_last_error_block) 3647651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 364866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3649651e1c3bSJoe Perches printk(KERN_CONT "\n"); 365066e61a9eSTheodore Ts'o } 365166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 365266e61a9eSTheodore Ts'o } 365366e61a9eSTheodore Ts'o 3654bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3655bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3656bfff6873SLukas Czerner { 3657bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 36583d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 36593d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 36603d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 36613d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3662bfff6873SLukas Czerner int ret = 0; 366339fec688SShaoying Xu u64 start_time; 3664bfff6873SLukas Czerner 36653d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 36663d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 36673d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 36683d392b26STheodore Ts'o if (prefetch_ios) 36693d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 36703d392b26STheodore Ts'o prefetch_ios); 36713d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 36723d392b26STheodore Ts'o prefetch_ios); 36733d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 36743d392b26STheodore Ts'o ret = 1; 36753d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 36763d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 36773d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 36783d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 36793d392b26STheodore Ts'o ret = 0; 36803d392b26STheodore Ts'o } 36813d392b26STheodore Ts'o } 36823d392b26STheodore Ts'o return ret; 36833d392b26STheodore Ts'o } 3684bfff6873SLukas Czerner 36853d392b26STheodore Ts'o for (; group < ngroups; group++) { 3686bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3687bfff6873SLukas Czerner if (!gdp) { 3688bfff6873SLukas Czerner ret = 1; 3689bfff6873SLukas Czerner break; 3690bfff6873SLukas Czerner } 3691bfff6873SLukas Czerner 3692bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3693bfff6873SLukas Czerner break; 3694bfff6873SLukas Czerner } 3695bfff6873SLukas Czerner 36967f511862STheodore Ts'o if (group >= ngroups) 3697bfff6873SLukas Czerner ret = 1; 3698bfff6873SLukas Czerner 3699bfff6873SLukas Czerner if (!ret) { 370039fec688SShaoying Xu start_time = ktime_get_real_ns(); 3701bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3702bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 37033d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3704bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 370539fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 370639fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3707bfff6873SLukas Czerner } 3708bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3709bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3710bfff6873SLukas Czerner } 3711bfff6873SLukas Czerner return ret; 3712bfff6873SLukas Czerner } 3713bfff6873SLukas Czerner 3714bfff6873SLukas Czerner /* 3715bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 37164ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3717bfff6873SLukas Czerner */ 3718bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3719bfff6873SLukas Czerner { 3720bfff6873SLukas Czerner if (!elr) 3721bfff6873SLukas Czerner return; 3722bfff6873SLukas Czerner 3723bfff6873SLukas Czerner list_del(&elr->lr_request); 37243d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3725bfff6873SLukas Czerner kfree(elr); 3726bfff6873SLukas Czerner } 3727bfff6873SLukas Czerner 3728bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3729bfff6873SLukas Czerner { 37301bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37311bb933fbSLukas Czerner if (!ext4_li_info) { 37321bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3733bfff6873SLukas Czerner return; 37341bb933fbSLukas Czerner } 3735bfff6873SLukas Czerner 3736bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37371bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3738bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37391bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3740bfff6873SLukas Czerner } 3741bfff6873SLukas Czerner 37428f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37438f1f7453SEric Sandeen 3744bfff6873SLukas Czerner /* 3745bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3746bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3747bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3748bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3749bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3750bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3751bfff6873SLukas Czerner * next waking time and put itself into sleep. 3752bfff6873SLukas Czerner */ 3753bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3754bfff6873SLukas Czerner { 3755c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3756bfff6873SLukas Czerner struct list_head *pos, *n; 3757bfff6873SLukas Czerner struct ext4_li_request *elr; 37584ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3759bfff6873SLukas Czerner 3760bfff6873SLukas Czerner BUG_ON(NULL == eli); 3761*3b575495SLalith Rajendran set_freezable(); 3762bfff6873SLukas Czerner 3763bfff6873SLukas Czerner cont_thread: 3764bfff6873SLukas Czerner while (true) { 3765bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3766bfff6873SLukas Czerner 3767bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3768bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3769bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3770bfff6873SLukas Czerner goto exit_thread; 3771bfff6873SLukas Czerner } 3772bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3773e22834f0SDmitry Monakhov int err = 0; 3774e22834f0SDmitry Monakhov int progress = 0; 3775bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3776bfff6873SLukas Czerner lr_request); 3777bfff6873SLukas Czerner 3778e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3779e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3780e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3781e22834f0SDmitry Monakhov continue; 3782e22834f0SDmitry Monakhov } 3783e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3784e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3785e22834f0SDmitry Monakhov progress = 1; 3786e22834f0SDmitry Monakhov /* 3787e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3788e22834f0SDmitry Monakhov * be removed from the list, it is 3789e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3790e22834f0SDmitry Monakhov */ 3791e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3792e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3793e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3794e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3795e22834f0SDmitry Monakhov n = pos->next; 3796e22834f0SDmitry Monakhov } 3797e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3798e22834f0SDmitry Monakhov } 3799b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3800e22834f0SDmitry Monakhov if (err) { 3801bfff6873SLukas Czerner ext4_remove_li_request(elr); 3802bfff6873SLukas Czerner continue; 3803bfff6873SLukas Czerner } 3804e22834f0SDmitry Monakhov if (!progress) { 3805e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3806e22834f0SDmitry Monakhov (prandom_u32() 3807e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3808b2c78cd0STheodore Ts'o } 3809bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3810bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3811bfff6873SLukas Czerner } 3812bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3813bfff6873SLukas Czerner 3814a0acae0eSTejun Heo try_to_freeze(); 3815bfff6873SLukas Czerner 38164ed5c033SLukas Czerner cur = jiffies; 38174ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3818f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3819bfff6873SLukas Czerner cond_resched(); 3820bfff6873SLukas Czerner continue; 3821bfff6873SLukas Czerner } 3822bfff6873SLukas Czerner 38234ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38244ed5c033SLukas Czerner 38258f1f7453SEric Sandeen if (kthread_should_stop()) { 38268f1f7453SEric Sandeen ext4_clear_request_list(); 38278f1f7453SEric Sandeen goto exit_thread; 38288f1f7453SEric Sandeen } 3829bfff6873SLukas Czerner } 3830bfff6873SLukas Czerner 3831bfff6873SLukas Czerner exit_thread: 3832bfff6873SLukas Czerner /* 3833bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3834bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3835bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3836bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3837bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3838bfff6873SLukas Czerner * new one. 3839bfff6873SLukas Czerner */ 3840bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3841bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3842bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3843bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3844bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3845bfff6873SLukas Czerner goto cont_thread; 3846bfff6873SLukas Czerner } 3847bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3848bfff6873SLukas Czerner kfree(ext4_li_info); 3849bfff6873SLukas Czerner ext4_li_info = NULL; 3850bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3851bfff6873SLukas Czerner 3852bfff6873SLukas Czerner return 0; 3853bfff6873SLukas Czerner } 3854bfff6873SLukas Czerner 3855bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3856bfff6873SLukas Czerner { 3857bfff6873SLukas Czerner struct list_head *pos, *n; 3858bfff6873SLukas Czerner struct ext4_li_request *elr; 3859bfff6873SLukas Czerner 3860bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3861bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3862bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3863bfff6873SLukas Czerner lr_request); 3864bfff6873SLukas Czerner ext4_remove_li_request(elr); 3865bfff6873SLukas Czerner } 3866bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3867bfff6873SLukas Czerner } 3868bfff6873SLukas Czerner 3869bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3870bfff6873SLukas Czerner { 38718f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 38728f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 38738f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 38748f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3875bfff6873SLukas Czerner ext4_clear_request_list(); 3876bfff6873SLukas Czerner kfree(ext4_li_info); 3877bfff6873SLukas Czerner ext4_li_info = NULL; 387892b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3879bfff6873SLukas Czerner "initialization thread\n", 3880bfff6873SLukas Czerner err); 3881bfff6873SLukas Czerner return err; 3882bfff6873SLukas Czerner } 3883bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3884bfff6873SLukas Czerner return 0; 3885bfff6873SLukas Czerner } 3886bfff6873SLukas Czerner 3887bfff6873SLukas Czerner /* 3888bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3889bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3890bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3891bfff6873SLukas Czerner * groups and return total number of groups. 3892bfff6873SLukas Czerner */ 3893bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3894bfff6873SLukas Czerner { 3895bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3896bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3897bfff6873SLukas Czerner 38988844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 38998844618dSTheodore Ts'o return ngroups; 39008844618dSTheodore Ts'o 3901bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3902bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3903bfff6873SLukas Czerner if (!gdp) 3904bfff6873SLukas Czerner continue; 3905bfff6873SLukas Czerner 390650122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3907bfff6873SLukas Czerner break; 3908bfff6873SLukas Czerner } 3909bfff6873SLukas Czerner 3910bfff6873SLukas Czerner return group; 3911bfff6873SLukas Czerner } 3912bfff6873SLukas Czerner 3913bfff6873SLukas Czerner static int ext4_li_info_new(void) 3914bfff6873SLukas Czerner { 3915bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3916bfff6873SLukas Czerner 3917bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3918bfff6873SLukas Czerner if (!eli) 3919bfff6873SLukas Czerner return -ENOMEM; 3920bfff6873SLukas Czerner 3921bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3922bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3923bfff6873SLukas Czerner 3924bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3925bfff6873SLukas Czerner 3926bfff6873SLukas Czerner ext4_li_info = eli; 3927bfff6873SLukas Czerner 3928bfff6873SLukas Czerner return 0; 3929bfff6873SLukas Czerner } 3930bfff6873SLukas Czerner 3931bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3932bfff6873SLukas Czerner ext4_group_t start) 3933bfff6873SLukas Czerner { 3934bfff6873SLukas Czerner struct ext4_li_request *elr; 3935bfff6873SLukas Czerner 3936bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3937bfff6873SLukas Czerner if (!elr) 3938bfff6873SLukas Czerner return NULL; 3939bfff6873SLukas Czerner 3940bfff6873SLukas Czerner elr->lr_super = sb; 39413d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 394221175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39433d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3944bfff6873SLukas Czerner elr->lr_next_group = start; 394521175ca4SHarshad Shirwadkar } else { 394621175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39473d392b26STheodore Ts'o } 3948bfff6873SLukas Czerner 3949bfff6873SLukas Czerner /* 3950bfff6873SLukas Czerner * Randomize first schedule time of the request to 3951bfff6873SLukas Czerner * spread the inode table initialization requests 3952bfff6873SLukas Czerner * better. 3953bfff6873SLukas Czerner */ 3954dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3955dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3956bfff6873SLukas Czerner return elr; 3957bfff6873SLukas Czerner } 3958bfff6873SLukas Czerner 39597f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3960bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3961bfff6873SLukas Czerner { 3962bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 39637f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 396449598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 39656c5a6cb9SAndrew Morton int ret = 0; 3966bfff6873SLukas Czerner 39677f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 396851ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 396951ce6511SLukas Czerner /* 397051ce6511SLukas Czerner * Reset timeout so it can be computed again, because 397151ce6511SLukas Czerner * s_li_wait_mult might have changed. 397251ce6511SLukas Czerner */ 397351ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 39747f511862STheodore Ts'o goto out; 397551ce6511SLukas Czerner } 3976bfff6873SLukas Czerner 3977426d15adSJosh Triplett if (sb_rdonly(sb) || 3978426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 3979426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 39807f511862STheodore Ts'o goto out; 3981bfff6873SLukas Czerner 3982bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 39837f511862STheodore Ts'o if (!elr) { 39847f511862STheodore Ts'o ret = -ENOMEM; 39857f511862STheodore Ts'o goto out; 39867f511862STheodore Ts'o } 3987bfff6873SLukas Czerner 3988bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3989bfff6873SLukas Czerner ret = ext4_li_info_new(); 3990bfff6873SLukas Czerner if (ret) 3991bfff6873SLukas Czerner goto out; 3992bfff6873SLukas Czerner } 3993bfff6873SLukas Czerner 3994bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3995bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3996bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3997bfff6873SLukas Czerner 3998bfff6873SLukas Czerner sbi->s_li_request = elr; 399946e4690bSTao Ma /* 400046e4690bSTao Ma * set elr to NULL here since it has been inserted to 400146e4690bSTao Ma * the request_list and the removal and free of it is 400246e4690bSTao Ma * handled by ext4_clear_request_list from now on. 400346e4690bSTao Ma */ 400446e4690bSTao Ma elr = NULL; 4005bfff6873SLukas Czerner 4006bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 4007bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 4008bfff6873SLukas Czerner if (ret) 4009bfff6873SLukas Czerner goto out; 4010bfff6873SLukas Czerner } 4011bfff6873SLukas Czerner out: 4012bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 4013beed5ecbSNicolas Kaiser if (ret) 4014bfff6873SLukas Czerner kfree(elr); 4015bfff6873SLukas Czerner return ret; 4016bfff6873SLukas Czerner } 4017bfff6873SLukas Czerner 4018bfff6873SLukas Czerner /* 4019bfff6873SLukas Czerner * We do not need to lock anything since this is called on 4020bfff6873SLukas Czerner * module unload. 4021bfff6873SLukas Czerner */ 4022bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4023bfff6873SLukas Czerner { 4024bfff6873SLukas Czerner /* 4025bfff6873SLukas Czerner * If thread exited earlier 4026bfff6873SLukas Czerner * there's nothing to be done. 4027bfff6873SLukas Czerner */ 40288f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4029bfff6873SLukas Czerner return; 4030bfff6873SLukas Czerner 40318f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4032bfff6873SLukas Czerner } 4033bfff6873SLukas Czerner 403425ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 403525ed6e8aSDarrick J. Wong { 403625ed6e8aSDarrick J. Wong int ret = 1; 403725ed6e8aSDarrick J. Wong int compat, incompat; 403825ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 403925ed6e8aSDarrick J. Wong 40409aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4041db9ee220SDarrick J. Wong /* journal checksum v3 */ 404225ed6e8aSDarrick J. Wong compat = 0; 4043db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 404425ed6e8aSDarrick J. Wong } else { 404525ed6e8aSDarrick J. Wong /* journal checksum v1 */ 404625ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 404725ed6e8aSDarrick J. Wong incompat = 0; 404825ed6e8aSDarrick J. Wong } 404925ed6e8aSDarrick J. Wong 4050feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4051feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4052feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4053feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 405425ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 405525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 405625ed6e8aSDarrick J. Wong compat, 0, 405725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 405825ed6e8aSDarrick J. Wong incompat); 405925ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 406025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 406125ed6e8aSDarrick J. Wong compat, 0, 406225ed6e8aSDarrick J. Wong incompat); 406325ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 406425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 406525ed6e8aSDarrick J. Wong } else { 4066feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4067feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 406825ed6e8aSDarrick J. Wong } 406925ed6e8aSDarrick J. Wong 407025ed6e8aSDarrick J. Wong return ret; 407125ed6e8aSDarrick J. Wong } 407225ed6e8aSDarrick J. Wong 4073952fc18eSTheodore Ts'o /* 4074952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4075952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4076952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4077952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4078952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4079952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4080952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4081952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4082952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4083952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4084952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4085952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4086952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4087952fc18eSTheodore Ts'o */ 4088952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4089952fc18eSTheodore Ts'o char *buf) 4090952fc18eSTheodore Ts'o { 4091952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4092952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4093952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4094952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4095952fc18eSTheodore Ts'o int s, j, count = 0; 409610b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4097952fc18eSTheodore Ts'o 4098e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 409910b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 410010b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 41010548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 41020548bbb8STheodore Ts'o 4103952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4104952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4105952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4106952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4107952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4108952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4109952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4110952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4111952fc18eSTheodore Ts'o count++; 4112952fc18eSTheodore Ts'o } 4113952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4114952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4115952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4116952fc18eSTheodore Ts'o count++; 4117952fc18eSTheodore Ts'o } 4118952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4119952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4120952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4121952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4122952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4123952fc18eSTheodore Ts'o count++; 4124952fc18eSTheodore Ts'o } 4125952fc18eSTheodore Ts'o if (i != grp) 4126952fc18eSTheodore Ts'o continue; 4127952fc18eSTheodore Ts'o s = 0; 4128952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4129952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4130952fc18eSTheodore Ts'o count++; 4131952fc18eSTheodore Ts'o } 4132c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4133c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4134c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4135c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4136c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4137952fc18eSTheodore Ts'o } 4138c48ae41bSTheodore Ts'o count += j; 4139c48ae41bSTheodore Ts'o for (; j > 0; j--) 4140c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4141952fc18eSTheodore Ts'o } 4142952fc18eSTheodore Ts'o if (!count) 4143952fc18eSTheodore Ts'o return 0; 4144952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4145952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4146952fc18eSTheodore Ts'o } 4147952fc18eSTheodore Ts'o 4148952fc18eSTheodore Ts'o /* 4149952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4150952fc18eSTheodore Ts'o */ 4151952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4152952fc18eSTheodore Ts'o { 4153952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4154952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 41553c816dedSEric Whitney struct inode *j_inode; 41563c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4157952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4158952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 41594fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4160952fc18eSTheodore Ts'o 4161952fc18eSTheodore Ts'o if (!buf) 4162952fc18eSTheodore Ts'o return -ENOMEM; 4163952fc18eSTheodore Ts'o 4164952fc18eSTheodore Ts'o /* 4165952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4166952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4167952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4168952fc18eSTheodore Ts'o */ 4169952fc18eSTheodore Ts'o 4170952fc18eSTheodore Ts'o /* 4171952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4172952fc18eSTheodore Ts'o */ 4173952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4174952fc18eSTheodore Ts'o 4175952fc18eSTheodore Ts'o /* 4176952fc18eSTheodore Ts'o * Add the overhead found in each block group 4177952fc18eSTheodore Ts'o */ 4178952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4179952fc18eSTheodore Ts'o int blks; 4180952fc18eSTheodore Ts'o 4181952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4182952fc18eSTheodore Ts'o overhead += blks; 4183952fc18eSTheodore Ts'o if (blks) 4184952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4185952fc18eSTheodore Ts'o cond_resched(); 4186952fc18eSTheodore Ts'o } 41873c816dedSEric Whitney 41883c816dedSEric Whitney /* 41893c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 41903c816dedSEric Whitney * loaded or not 41913c816dedSEric Whitney */ 4192ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4193ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4194f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4195f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 41963c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 41973c816dedSEric Whitney if (j_inode) { 41983c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 41993c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 42003c816dedSEric Whitney iput(j_inode); 42013c816dedSEric Whitney } else { 42023c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 42033c816dedSEric Whitney } 42043c816dedSEric Whitney } 4205952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4206952fc18eSTheodore Ts'o smp_wmb(); 4207952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4208952fc18eSTheodore Ts'o return 0; 4209952fc18eSTheodore Ts'o } 4210952fc18eSTheodore Ts'o 4211b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 421227dd4385SLukas Czerner { 421327dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4214b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 421527dd4385SLukas Czerner 421627dd4385SLukas Czerner /* 421730fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 421830fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 421930fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 422030fac0f7SJan Kara * to keep ext2/3 backward compatibility. 422130fac0f7SJan Kara */ 4222e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4223b5799018STheodore Ts'o return; 422430fac0f7SJan Kara /* 422527dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 422627dd4385SLukas Czerner * This should cover the situations where we can not afford to run 422727dd4385SLukas Czerner * out of space like for example punch hole, or converting 4228556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 422927dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 423027dd4385SLukas Czerner * very rare. 423127dd4385SLukas Czerner */ 4232b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4233b5799018STheodore Ts'o sbi->s_cluster_bits); 423427dd4385SLukas Czerner 423527dd4385SLukas Czerner do_div(resv_clusters, 50); 423627dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 423727dd4385SLukas Czerner 4238b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 423927dd4385SLukas Czerner } 424027dd4385SLukas Czerner 4241ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4242ca9b404fSRoman Anufriev { 4243ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4244ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4245ca9b404fSRoman Anufriev return "none"; 4246ca9b404fSRoman Anufriev 4247ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4248ca9b404fSRoman Anufriev return "journalled"; 4249ca9b404fSRoman Anufriev else 4250ca9b404fSRoman Anufriev return "writeback"; 4251ca9b404fSRoman Anufriev #else 4252ca9b404fSRoman Anufriev return "disabled"; 4253ca9b404fSRoman Anufriev #endif 4254ca9b404fSRoman Anufriev } 4255ca9b404fSRoman Anufriev 4256188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4257188c299eSJan Kara enum ext4_journal_trigger_type type, 4258188c299eSJan Kara void (*trigger)( 4259188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4260188c299eSJan Kara struct buffer_head *bh, 4261188c299eSJan Kara void *mapped_data, 4262188c299eSJan Kara size_t size)) 4263188c299eSJan Kara { 4264188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4265188c299eSJan Kara 4266188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4267188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4268188c299eSJan Kara } 4269188c299eSJan Kara 42707edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4271ac27a0ecSDave Kleikamp { 42727edfd85bSLukas Czerner if (!sbi) 42737edfd85bSLukas Czerner return; 42747edfd85bSLukas Czerner 42757edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 42768012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 42777edfd85bSLukas Czerner kfree(sbi); 42787edfd85bSLukas Czerner } 42797edfd85bSLukas Czerner 42807edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 42817edfd85bSLukas Czerner { 42827edfd85bSLukas Czerner struct ext4_sb_info *sbi; 42837edfd85bSLukas Czerner 42847edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 42857edfd85bSLukas Czerner if (!sbi) 42867edfd85bSLukas Czerner return NULL; 42877edfd85bSLukas Czerner 42888012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 42898012b866SShiyang Ruan NULL, NULL); 42907edfd85bSLukas Czerner 42917edfd85bSLukas Czerner sbi->s_blockgroup_lock = 42927edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 42937edfd85bSLukas Czerner 42947edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 42957edfd85bSLukas Czerner goto err_out; 42967edfd85bSLukas Czerner 42977edfd85bSLukas Czerner sb->s_fs_info = sbi; 42987edfd85bSLukas Czerner sbi->s_sb = sb; 42997edfd85bSLukas Czerner return sbi; 43007edfd85bSLukas Czerner err_out: 43018012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 43027edfd85bSLukas Czerner kfree(sbi); 43037edfd85bSLukas Czerner return NULL; 43047edfd85bSLukas Czerner } 43057edfd85bSLukas Czerner 4306960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 43077edfd85bSLukas Czerner { 43081d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 4309617ba13bSMingming Cao struct ext4_super_block *es = NULL; 43107edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 43117c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4312617ba13bSMingming Cao ext4_fsblk_t block; 431370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4314ac27a0ecSDave Kleikamp unsigned long offset = 0; 4315ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 4316ac27a0ecSDave Kleikamp struct inode *root; 4317dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 4318281b5995STheodore Ts'o int blocksize, clustersize; 43194ec11028STheodore Ts'o unsigned int db_count; 43204ec11028STheodore Ts'o unsigned int i; 4321ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 4322bd81d8eeSLaurent Vivier __u64 blocks_count; 432307aa2ea1SLukas Czerner int err = 0; 4324bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 43257edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4326960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 4327b237e304SHarshad Shirwadkar 4328b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4329e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 43307edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4331ac27a0ecSDave Kleikamp 4332240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4333f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 43348446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4335ac27a0ecSDave Kleikamp 433607aa2ea1SLukas Czerner /* -EINVAL is default */ 4337dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4338617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4339ac27a0ecSDave Kleikamp if (!blocksize) { 4340b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4341ac27a0ecSDave Kleikamp goto out_fail; 4342ac27a0ecSDave Kleikamp } 4343ac27a0ecSDave Kleikamp 4344ac27a0ecSDave Kleikamp /* 4345617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4346ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4347ac27a0ecSDave Kleikamp */ 4348617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 43497edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 435070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4351ac27a0ecSDave Kleikamp } else { 43527edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4353ac27a0ecSDave Kleikamp } 4354ac27a0ecSDave Kleikamp 43558394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 43568394a6abSzhangyi (F) if (IS_ERR(bh)) { 4357b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 43588394a6abSzhangyi (F) ret = PTR_ERR(bh); 4359ac27a0ecSDave Kleikamp goto out_fail; 4360ac27a0ecSDave Kleikamp } 4361ac27a0ecSDave Kleikamp /* 4362ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4363617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4364ac27a0ecSDave Kleikamp */ 43652716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4366ac27a0ecSDave Kleikamp sbi->s_es = es; 4367ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4368617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 4369617ba13bSMingming Cao goto cantfind_ext4; 4370afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4371ac27a0ecSDave Kleikamp 4372feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 4373e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 4374e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 4375363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 4376feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 4377feb0ab32SDarrick J. Wong 4378d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 4379d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 4380d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4381d25425f8SDarrick J. Wong "unknown checksum algorithm."); 4382d25425f8SDarrick J. Wong silent = 1; 4383d25425f8SDarrick J. Wong goto cantfind_ext4; 4384d25425f8SDarrick J. Wong } 438502f310fcSJan Kara ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 438602f310fcSJan Kara ext4_orphan_file_block_trigger); 4387d25425f8SDarrick J. Wong 43880441984aSDarrick J. Wong /* Load the checksum driver */ 43890441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 43900441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 43910441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 43920441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 43930441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 43940441984aSDarrick J. Wong goto failed_mount; 43950441984aSDarrick J. Wong } 43960441984aSDarrick J. Wong 4397a9c47317SDarrick J. Wong /* Check superblock checksum */ 4398a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 4399a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4400a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 4401a9c47317SDarrick J. Wong silent = 1; 44026a797d27SDarrick J. Wong ret = -EFSBADCRC; 4403a9c47317SDarrick J. Wong goto cantfind_ext4; 4404a9c47317SDarrick J. Wong } 4405a9c47317SDarrick J. Wong 4406a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 4407e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 44088c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4409dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4410a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4411a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 4412a9c47317SDarrick J. Wong 4413ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 4414ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 4415fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 4416617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 4417fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 441887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 4419fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 4420617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 4421fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 4422ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 4423fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 442403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 4425fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 44262e7842b8SHugh Dickins #endif 4427995a3ed6SHarshad Shirwadkar if (ext4_has_feature_fast_commit(sb)) 4428995a3ed6SHarshad Shirwadkar set_opt2(sb, JOURNAL_FAST_COMMIT); 442998c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 443098c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 443198c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 443298c1a759SDarrick J. Wong 4433617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 4434fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4435617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 4436fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4437617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 4438fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 4439ac27a0ecSDave Kleikamp 4440617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 4441fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 4442bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 4443fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 4444bb4f397aSAneesh Kumar K.V else 4445fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 444645f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 4447fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 44488b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 4449fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 4450ac27a0ecSDave Kleikamp 445108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 445208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 445330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 445430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 445530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4456ac27a0ecSDave Kleikamp 44578b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 4458fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 4459ac27a0ecSDave Kleikamp 44601e2462f9SMingming Cao /* 4461dd919b98SAneesh Kumar K.V * enable delayed allocation by default 4462dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 4463dd919b98SAneesh Kumar K.V */ 4464bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 44658b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 4466fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 4467dd919b98SAneesh Kumar K.V 446851ce6511SLukas Czerner /* 446951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 447051ce6511SLukas Czerner * no mount option specified. 447151ce6511SLukas Czerner */ 447251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 447351ce6511SLukas Czerner 4474c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4475c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4476c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4477c9200760STheodore Ts'o "Invalid log block size: %u", 4478c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4479c9200760STheodore Ts'o goto failed_mount; 4480c9200760STheodore Ts'o } 4481c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4482c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4483c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4484c9200760STheodore Ts'o "Invalid log cluster size: %u", 4485c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4486c9200760STheodore Ts'o goto failed_mount; 4487c9200760STheodore Ts'o } 4488c9200760STheodore Ts'o 4489c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4490626b035bSRitesh Harjani 4491626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4492626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4493626b035bSRitesh Harjani 44949803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44959803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44969803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44979803387cSTheodore Ts'o } else { 44989803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 44999803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 45009803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 45019803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 45029803387cSTheodore Ts'o sbi->s_first_ino); 45039803387cSTheodore Ts'o goto failed_mount; 45049803387cSTheodore Ts'o } 45059803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 45069803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 45079803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 45089803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45099803387cSTheodore Ts'o "unsupported inode size: %d", 45109803387cSTheodore Ts'o sbi->s_inode_size); 45114f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 45129803387cSTheodore Ts'o goto failed_mount; 45139803387cSTheodore Ts'o } 45149803387cSTheodore Ts'o /* 45159803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 45169803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 45179803387cSTheodore Ts'o * field should suffice to ensure we have extra space 45189803387cSTheodore Ts'o * for all three. 45199803387cSTheodore Ts'o */ 45209803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 45219803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 45229803387cSTheodore Ts'o sb->s_time_gran = 1; 45239803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 45249803387cSTheodore Ts'o } else { 45259803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 45269803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 45279803387cSTheodore Ts'o } 45289803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 45299803387cSTheodore Ts'o } 45309803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 45319803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 45329803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 45339803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 45349803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 45359803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 45369803387cSTheodore Ts'o 45379803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 45389803387cSTheodore Ts'o if (v > max) { 45399803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45409803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 45419803387cSTheodore Ts'o goto failed_mount; 45429803387cSTheodore Ts'o } 45439803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 45449803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 45459803387cSTheodore Ts'o 45469803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 45479803387cSTheodore Ts'o if (v > max) { 45489803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 45499803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 45509803387cSTheodore Ts'o goto failed_mount; 45519803387cSTheodore Ts'o } 45529803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 45539803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 45549803387cSTheodore Ts'o } 45559803387cSTheodore Ts'o } 45569803387cSTheodore Ts'o 45577edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 45587edfd85bSLukas Czerner if (err < 0) 45595aee0f8aSTheodore Ts'o goto failed_mount; 45607edfd85bSLukas Czerner 45615a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 45627edfd85bSLukas Czerner 45637edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 45647edfd85bSLukas Czerner if (err < 0) 45657edfd85bSLukas Czerner goto failed_mount; 45667edfd85bSLukas Czerner 456785456054SEric Biggers ext4_apply_options(fc, sb); 4568ac27a0ecSDave Kleikamp 45695298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 4570f8f4acb6SDaniel Rosenberg if (ext4_has_feature_casefold(sb) && !sb->s_encoding) { 4571c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4572c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4573aa8bf298SChristoph Hellwig __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 4574c83ad55eSGabriel Krisman Bertazi 4575aa8bf298SChristoph Hellwig encoding_info = ext4_sb_read_encoding(es); 4576aa8bf298SChristoph Hellwig if (!encoding_info) { 4577c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4578c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4579c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4580c83ad55eSGabriel Krisman Bertazi } 4581c83ad55eSGabriel Krisman Bertazi 4582c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4583c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4584c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 458549bd03ccSChristoph Hellwig "can't mount with superblock charset: %s-%u.%u.%u " 4586c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 458749bd03ccSChristoph Hellwig encoding_info->name, 458849bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 458949bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 459049bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 4591c83ad55eSGabriel Krisman Bertazi encoding_flags); 4592c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4593c83ad55eSGabriel Krisman Bertazi } 4594c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 459549bd03ccSChristoph Hellwig "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 459649bd03ccSChristoph Hellwig unicode_major(encoding_info->version), 459749bd03ccSChristoph Hellwig unicode_minor(encoding_info->version), 459849bd03ccSChristoph Hellwig unicode_rev(encoding_info->version), 459949bd03ccSChristoph Hellwig encoding_flags); 4600c83ad55eSGabriel Krisman Bertazi 4601f8f4acb6SDaniel Rosenberg sb->s_encoding = encoding; 4602f8f4acb6SDaniel Rosenberg sb->s_encoding_flags = encoding_flags; 4603c83ad55eSGabriel Krisman Bertazi } 4604c83ad55eSGabriel Krisman Bertazi #endif 4605c83ad55eSGabriel Krisman Bertazi 460656889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4607556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4608781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4609244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4610556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 461156889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 461256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 461356889787STheodore Ts'o "both data=journal and delalloc"); 461456889787STheodore Ts'o goto failed_mount; 461556889787STheodore Ts'o } 4616fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4617923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4618923ae0ffSRoss Zwisler "both data=journal and dax"); 4619923ae0ffSRoss Zwisler goto failed_mount; 4620923ae0ffSRoss Zwisler } 462173b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 462273b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 462373b92a2aSSergey Karamov "encrypted files will use data=ordered " 462473b92a2aSSergey Karamov "instead of data journaling mode"); 462573b92a2aSSergey Karamov } 462656889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 462756889787STheodore Ts'o clear_opt(sb, DELALLOC); 4628001e4a87STejun Heo } else { 4629001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 463056889787STheodore Ts'o } 463156889787STheodore Ts'o 46321751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 46331751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4634ac27a0ecSDave Kleikamp 4635617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4636e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4637e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4638e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4639b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4640b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4641b31e1552SEric Sandeen "running e2fsck is recommended"); 4642469108ffSTheodore Tso 4643ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4644ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4645e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4646ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4647ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4648ed3654ebSTheodore Ts'o goto failed_mount; 4649ed3654ebSTheodore Ts'o } 4650dec214d0STahsin Erdogan 4651dec214d0STahsin Erdogan /* 4652dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4653dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4654dec214d0STahsin Erdogan */ 4655dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4656dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4657dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4658dec214d0STahsin Erdogan goto failed_mount; 4659dec214d0STahsin Erdogan } 4660ed3654ebSTheodore Ts'o } 4661ed3654ebSTheodore Ts'o 46622035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 46632035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 46642035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 46652035e776STheodore Ts'o "using the ext4 subsystem"); 46662035e776STheodore Ts'o else { 46670d9366d6SEric Sandeen /* 46680d9366d6SEric Sandeen * If we're probing be silent, if this looks like 46690d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 46700d9366d6SEric Sandeen */ 46710d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 46720d9366d6SEric Sandeen goto failed_mount; 46732035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 46742035e776STheodore Ts'o "to feature incompatibilities"); 46752035e776STheodore Ts'o goto failed_mount; 46762035e776STheodore Ts'o } 46772035e776STheodore Ts'o } 46782035e776STheodore Ts'o 46792035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 46802035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 46812035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 46822035e776STheodore Ts'o "using the ext4 subsystem"); 46832035e776STheodore Ts'o else { 46840d9366d6SEric Sandeen /* 46850d9366d6SEric Sandeen * If we're probing be silent, if this looks like 46860d9366d6SEric Sandeen * it's actually an ext4 filesystem. 46870d9366d6SEric Sandeen */ 46880d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 46890d9366d6SEric Sandeen goto failed_mount; 46902035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 46912035e776STheodore Ts'o "to feature incompatibilities"); 46922035e776STheodore Ts'o goto failed_mount; 46932035e776STheodore Ts'o } 46942035e776STheodore Ts'o } 46952035e776STheodore Ts'o 4696469108ffSTheodore Tso /* 4697ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4698ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4699ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4700ac27a0ecSDave Kleikamp */ 4701bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4702ac27a0ecSDave Kleikamp goto failed_mount; 4703a13fb1a4SEric Sandeen 47045b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 47055b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 47065b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 47075b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 47085b9554dcSTheodore Ts'o goto failed_mount; 47095b9554dcSTheodore Ts'o } 47105b9554dcSTheodore Ts'o 471189b93a7bSChristoph Hellwig if (sbi->s_daxdev) { 47127b0800d0SChristoph Hellwig if (blocksize == PAGE_SIZE) 4713a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 47147b0800d0SChristoph Hellwig else 47157b0800d0SChristoph Hellwig ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 47167b0800d0SChristoph Hellwig } 4717a8ab6d38SIra Weiny 4718fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4719559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4720559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4721559db4c6SRoss Zwisler " that may contain inline data"); 4722361d24d4SEric Sandeen goto failed_mount; 4723559db4c6SRoss Zwisler } 4724a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 472524f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4726361d24d4SEric Sandeen "DAX unsupported by block device."); 4727361d24d4SEric Sandeen goto failed_mount; 472824f3478dSDan Williams } 4729923ae0ffSRoss Zwisler } 4730923ae0ffSRoss Zwisler 4731e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 47326ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 47336ddb2447STheodore Ts'o es->s_encryption_level); 47346ddb2447STheodore Ts'o goto failed_mount; 47356ddb2447STheodore Ts'o } 47366ddb2447STheodore Ts'o 4737ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4738afd09b61SAlexey Makhalov /* 4739afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4740afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4741afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4742afd09b61SAlexey Makhalov */ 4743afd09b61SAlexey Makhalov brelse(bh); 4744ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4745ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4746b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4747ce40733cSAneesh Kumar K.V blocksize); 4748afd09b61SAlexey Makhalov bh = NULL; 4749ac27a0ecSDave Kleikamp goto failed_mount; 4750ac27a0ecSDave Kleikamp } 4751ac27a0ecSDave Kleikamp 47527edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 475370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 47548394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 47558394a6abSzhangyi (F) if (IS_ERR(bh)) { 4756b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4757b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 47588394a6abSzhangyi (F) ret = PTR_ERR(bh); 47598394a6abSzhangyi (F) bh = NULL; 4760ac27a0ecSDave Kleikamp goto failed_mount; 4761ac27a0ecSDave Kleikamp } 47622716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4763ac27a0ecSDave Kleikamp sbi->s_es = es; 4764617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4765b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4766b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4767ac27a0ecSDave Kleikamp goto failed_mount; 4768ac27a0ecSDave Kleikamp } 4769ac27a0ecSDave Kleikamp } 4770ac27a0ecSDave Kleikamp 4771e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4772f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4773f287a1a5STheodore Ts'o has_huge_files); 4774f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4775ac27a0ecSDave Kleikamp 47760d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4777e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 47788fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 47790d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4780d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4781b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4782b31e1552SEric Sandeen "unsupported descriptor size %lu", 47830d1ee42fSAlexandre Ratchov sbi->s_desc_size); 47840d1ee42fSAlexandre Ratchov goto failed_mount; 47850d1ee42fSAlexandre Ratchov } 47860d1ee42fSAlexandre Ratchov } else 47870d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 47880b8e58a1SAndreas Dilger 4789ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4790ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 47910b8e58a1SAndreas Dilger 4792617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4793ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4794617ba13bSMingming Cao goto cantfind_ext4; 4795cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4796cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4797cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4798b9c538daSJosh Triplett sbi->s_inodes_per_group); 4799cd6bb35bSTheodore Ts'o goto failed_mount; 4800cd6bb35bSTheodore Ts'o } 4801ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4802ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 48030d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4804ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4805c878bea3STheodore Ts'o sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 4806e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4807e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 48080b8e58a1SAndreas Dilger 4809ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4810ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4811ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4812e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4813f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4814f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4815f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4816f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4817f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4818bc98a42cSDavid Howells if (!sb_rdonly(sb)) 481923301410STheodore Ts'o es->s_flags |= 482023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4821f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4822f99b2589STheodore Ts'o #else 4823bc98a42cSDavid Howells if (!sb_rdonly(sb)) 482423301410STheodore Ts'o es->s_flags |= 482523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4826f99b2589STheodore Ts'o #endif 4827f99b2589STheodore Ts'o } 482823301410STheodore Ts'o } 4829ac27a0ecSDave Kleikamp 4830281b5995STheodore Ts'o /* Handle clustersize */ 4831281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4832ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4833281b5995STheodore Ts'o if (clustersize < blocksize) { 4834281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4835281b5995STheodore Ts'o "cluster size (%d) smaller than " 4836281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4837281b5995STheodore Ts'o goto failed_mount; 4838281b5995STheodore Ts'o } 4839281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4840281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4841281b5995STheodore Ts'o sbi->s_clusters_per_group = 4842281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4843281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4844281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4845281b5995STheodore Ts'o "#clusters per group too big: %lu", 4846281b5995STheodore Ts'o sbi->s_clusters_per_group); 4847281b5995STheodore Ts'o goto failed_mount; 4848281b5995STheodore Ts'o } 4849281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4850281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4851281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4852281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4853281b5995STheodore Ts'o sbi->s_blocks_per_group, 4854281b5995STheodore Ts'o sbi->s_clusters_per_group); 4855281b5995STheodore Ts'o goto failed_mount; 4856281b5995STheodore Ts'o } 4857281b5995STheodore Ts'o } else { 4858281b5995STheodore Ts'o if (clustersize != blocksize) { 4859bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4860bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4861bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4862bfe0a5f4STheodore Ts'o goto failed_mount; 4863281b5995STheodore Ts'o } 4864ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4866b31e1552SEric Sandeen "#blocks per group too big: %lu", 4867ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4868ac27a0ecSDave Kleikamp goto failed_mount; 4869ac27a0ecSDave Kleikamp } 4870281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4871281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4872281b5995STheodore Ts'o } 4873281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4874281b5995STheodore Ts'o 4875960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4876960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4877960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4878960fd856STheodore Ts'o 4879bf43d84bSEric Sandeen /* 4880bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4881bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4882bf43d84bSEric Sandeen */ 48835a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 488430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 48855a9ae68aSDarrick J. Wong if (err) { 4886b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4887bf43d84bSEric Sandeen " too large to mount safely on this system"); 4888ac27a0ecSDave Kleikamp goto failed_mount; 4889ac27a0ecSDave Kleikamp } 4890ac27a0ecSDave Kleikamp 4891617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4892617ba13bSMingming Cao goto cantfind_ext4; 4893e7c95593SEric Sandeen 48940f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 48955513b241SChristoph Hellwig blocks_count = sb_bdev_nr_blocks(sb); 48960f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4897b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4898b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 48990f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 49000f2ddca6SFrom: Thiemo Nagel goto failed_mount; 49010f2ddca6SFrom: Thiemo Nagel } 49020f2ddca6SFrom: Thiemo Nagel 49034ec11028STheodore Ts'o /* 49044ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 49054ec11028STheodore Ts'o * of the filesystem. 49064ec11028STheodore Ts'o */ 49074ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4908b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4909b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4910e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 49114ec11028STheodore Ts'o ext4_blocks_count(es)); 4912e7c95593SEric Sandeen goto failed_mount; 4913e7c95593SEric Sandeen } 4914bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4915bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4916bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4917bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4918bfe0a5f4STheodore Ts'o goto failed_mount; 4919bfe0a5f4STheodore Ts'o } 4920bfe0a5f4STheodore Ts'o 4921bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4922bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4923bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4924bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 49254ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4926df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 49274ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4928df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 49294ec11028STheodore Ts'o ext4_blocks_count(es), 49304ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 49314ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 49324ec11028STheodore Ts'o goto failed_mount; 49334ec11028STheodore Ts'o } 4934bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4935fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4936fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 49379e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 49389e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 49399e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 49409e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 49419e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 49429e463084STheodore Ts'o ret = -EINVAL; 49439e463084STheodore Ts'o goto failed_mount; 49449e463084STheodore Ts'o } 4945617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4946617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 49473a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 49482ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 49493a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 49503a4b77cdSEryu Guan "first meta block group too large: %u " 49513a4b77cdSEryu Guan "(group descriptor block count %u)", 49523a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 49533a4b77cdSEryu Guan goto failed_mount; 49543a4b77cdSEryu Guan } 49553a4b77cdSEryu Guan } 49561d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 49571d0c3924STheodore Ts'o kvmalloc_array(db_count, 4958f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 49591d0c3924STheodore Ts'o GFP_KERNEL)); 4960ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4961b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 49622cde417dSTheodore Ts'o ret = -ENOMEM; 4963ac27a0ecSDave Kleikamp goto failed_mount; 4964ac27a0ecSDave Kleikamp } 4965ac27a0ecSDave Kleikamp 4966705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4967ac27a0ecSDave Kleikamp 496885c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 496985c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 497085c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 49715df1d412Szhangyi (F) ext4_sb_breadahead_unmovable(sb, block); 497285c8f176SAndrew Perepechko } 497385c8f176SAndrew Perepechko 4974ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 49751d0c3924STheodore Ts'o struct buffer_head *bh; 49761d0c3924STheodore Ts'o 497770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 49788394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, block); 49798394a6abSzhangyi (F) if (IS_ERR(bh)) { 4980b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4981b31e1552SEric Sandeen "can't read group descriptor %d", i); 4982ac27a0ecSDave Kleikamp db_count = i; 49838394a6abSzhangyi (F) ret = PTR_ERR(bh); 4984ac27a0ecSDave Kleikamp goto failed_mount2; 4985ac27a0ecSDave Kleikamp } 49861d0c3924STheodore Ts'o rcu_read_lock(); 49871d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 49881d0c3924STheodore Ts'o rcu_read_unlock(); 4989ac27a0ecSDave Kleikamp } 499044de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4991829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4992b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 49936a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4994f9ae9cf5STheodore Ts'o goto failed_mount2; 4995ac27a0ecSDave Kleikamp } 4996772cb7c8SJose R. Santos 4997235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 4998c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 4999c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 500004496411STao Ma 5001a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5002eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5003ce7e010aSTheodore Ts'o goto failed_mount3; 5004ce7e010aSTheodore Ts'o 5005c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 500667a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5007c9de560dSAlex Tomas 5008f9ae9cf5STheodore Ts'o /* 5009f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5010f9ae9cf5STheodore Ts'o */ 5011f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5012617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5013617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5014643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5015a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5016ffcc4182SEric Biggers #endif 5017c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5018c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5019c93d8f88SEric Biggers #endif 5020ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5021617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5022e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 50231fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5024262b4662SJan Kara else 5025262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5026689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5027ac27a0ecSDave Kleikamp #endif 502885787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5029f2fa2ffcSAneesh Kumar K.V 5030ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 50313b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5032ac27a0ecSDave Kleikamp 5033aa75f4d3SHarshad Shirwadkar /* Initialize fast commit stuff */ 5034aa75f4d3SHarshad Shirwadkar atomic_set(&sbi->s_fc_subtid, 0); 5035aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 5036aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 5037aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 5038aa75f4d3SHarshad Shirwadkar INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 5039aa75f4d3SHarshad Shirwadkar sbi->s_fc_bytes = 0; 50409b5f6c9bSHarshad Shirwadkar ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 5041e85c81baSXin Yin sbi->s_fc_ineligible_tid = 0; 5042aa75f4d3SHarshad Shirwadkar spin_lock_init(&sbi->s_fc_lock); 5043aa75f4d3SHarshad Shirwadkar memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 50448016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions = NULL; 50458016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_size = 0; 50468016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_used = 0; 50478016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_regions_valid = 0; 50488016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes = NULL; 50498016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 50508016e29fSHarshad Shirwadkar sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 5051aa75f4d3SHarshad Shirwadkar 5052ac27a0ecSDave Kleikamp sb->s_root = NULL; 5053ac27a0ecSDave Kleikamp 5054ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 505502f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5056e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5057ac27a0ecSDave Kleikamp 5058bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5059c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 506050460fe8SDarrick J. Wong goto failed_mount3a; 5061c5e06d10SJohann Lombardi 5062ac27a0ecSDave Kleikamp /* 5063ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5064ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5065ac27a0ecSDave Kleikamp */ 5066e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 50677edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 50684753d8a2STheodore Ts'o if (err) 506950460fe8SDarrick J. Wong goto failed_mount3a; 5070bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5071e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5072b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5073b31e1552SEric Sandeen "suppressed and not mounted read-only"); 5074744692dcSJiaying Zhang goto failed_mount_wq; 5075ac27a0ecSDave Kleikamp } else { 50761e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 50771e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 50781e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50791e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 50801e381f60SDmitry Monakhov goto failed_mount_wq; 50811e381f60SDmitry Monakhov } 50821e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 50831e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50841e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 50851e381f60SDmitry Monakhov goto failed_mount_wq; 50861e381f60SDmitry Monakhov } 50871e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 50881e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50891e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 50901e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 50911e381f60SDmitry Monakhov goto failed_mount_wq; 50921e381f60SDmitry Monakhov } 50931e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 50941e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 50951e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 50961e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 50971e381f60SDmitry Monakhov goto failed_mount_wq; 50981e381f60SDmitry Monakhov } 509950b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 51001e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5101fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5102995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 51030390131bSFrank Mayhar sbi->s_journal = NULL; 51040390131bSFrank Mayhar needs_recovery = 0; 51050390131bSFrank Mayhar goto no_journal; 5106ac27a0ecSDave Kleikamp } 5107ac27a0ecSDave Kleikamp 5108e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5109eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5110eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5112744692dcSJiaying Zhang goto failed_mount_wq; 5113eb40a09cSJose R. Santos } 5114eb40a09cSJose R. Santos 511525ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 511625ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 511725ed6e8aSDarrick J. Wong "feature set"); 511825ed6e8aSDarrick J. Wong goto failed_mount_wq; 5119d4da6c9cSLinus Torvalds } 5120818d276cSGirish Shilamkar 5121a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5122a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5123a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5124a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5125a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5126a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5127a1e5e465SHarshad Shirwadkar } 5128a1e5e465SHarshad Shirwadkar 5129ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5130ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5131ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5132ac27a0ecSDave Kleikamp case 0: 5133ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 513463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 513563f57933SAndrew Morton * cope, else JOURNAL_DATA 513663f57933SAndrew Morton */ 5137dab291afSMingming Cao if (jbd2_journal_check_available_features 513827f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5139fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 514027f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 514127f394a7STyson Nottingham } else { 5142fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 514327f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 514427f394a7STyson Nottingham } 5145ac27a0ecSDave Kleikamp break; 5146ac27a0ecSDave Kleikamp 5147617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5148617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5149dab291afSMingming Cao if (!jbd2_journal_check_available_features 5150dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5151b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5152b31e1552SEric Sandeen "requested data journaling mode"); 5153744692dcSJiaying Zhang goto failed_mount_wq; 5154ac27a0ecSDave Kleikamp } 51555a150bdeSGustavo A. R. Silva break; 5156ac27a0ecSDave Kleikamp default: 5157ac27a0ecSDave Kleikamp break; 5158ac27a0ecSDave Kleikamp } 5159ab04df78SJan Kara 5160ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5161ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5162ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5163ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5164ab04df78SJan Kara goto failed_mount_wq; 5165ab04df78SJan Kara } 5166ab04df78SJan Kara 51677edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5168ac27a0ecSDave Kleikamp 5169342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5170afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5171342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5172afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 517318aadd47SBobi Jam 5174ce7e010aSTheodore Ts'o no_journal: 5175cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 517647387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 517747387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5178cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5179cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 51809c191f70ST Makphaibulchoke goto failed_mount_wq; 51819c191f70ST Makphaibulchoke } 51829c191f70ST Makphaibulchoke 5183dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5184dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5185dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5186dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5187dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5188dec214d0STahsin Erdogan goto failed_mount_wq; 5189dec214d0STahsin Erdogan } 5190dec214d0STahsin Erdogan } 5191cdb7ee4cSTahsin Erdogan } 5192dec214d0STahsin Erdogan 5193c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5194c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5195c93d8f88SEric Biggers goto failed_mount_wq; 5196c93d8f88SEric Biggers } 5197c93d8f88SEric Biggers 5198fd89d5f2STejun Heo /* 5199952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5200952fc18eSTheodore Ts'o * superblock if present. 5201952fc18eSTheodore Ts'o */ 5202952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 520385d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 520485d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 520585d825dbSTheodore Ts'o sbi->s_overhead = 0; 520685d825dbSTheodore Ts'o /* 520785d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 520885d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 520985d825dbSTheodore Ts'o * it to make sure we are using the correct value. 521085d825dbSTheodore Ts'o */ 521185d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 521285d825dbSTheodore Ts'o sbi->s_overhead = 0; 521385d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 521407aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 521507aa2ea1SLukas Czerner if (err) 5216952fc18eSTheodore Ts'o goto failed_mount_wq; 5217952fc18eSTheodore Ts'o } 5218952fc18eSTheodore Ts'o 5219952fc18eSTheodore Ts'o /* 5220fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5221fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5222fd89d5f2STejun Heo */ 52232e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 52242e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 52252e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 52262e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 522707aa2ea1SLukas Czerner ret = -ENOMEM; 52282e8fa54eSJan Kara goto failed_mount4; 52292e8fa54eSJan Kara } 52302e8fa54eSJan Kara 5231ac27a0ecSDave Kleikamp /* 5232dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5233ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5234ac27a0ecSDave Kleikamp */ 5235ac27a0ecSDave Kleikamp 52368a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 52371d1fe1eeSDavid Howells if (IS_ERR(root)) { 5238b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 52391d1fe1eeSDavid Howells ret = PTR_ERR(root); 524032a9bb57SManish Katiyar root = NULL; 5241ac27a0ecSDave Kleikamp goto failed_mount4; 5242ac27a0ecSDave Kleikamp } 5243ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5244b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 524594bf608aSAl Viro iput(root); 5246ac27a0ecSDave Kleikamp goto failed_mount4; 5247ac27a0ecSDave Kleikamp } 5248b886ee3eSGabriel Krisman Bertazi 524948fde701SAl Viro sb->s_root = d_make_root(root); 52501d1fe1eeSDavid Howells if (!sb->s_root) { 5251b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 52521d1fe1eeSDavid Howells ret = -ENOMEM; 52531d1fe1eeSDavid Howells goto failed_mount4; 52541d1fe1eeSDavid Howells } 5255ac27a0ecSDave Kleikamp 5256c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5257c89128a0SJaegeuk Kim if (ret == -EROFS) { 52581751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5259c89128a0SJaegeuk Kim ret = 0; 5260c89128a0SJaegeuk Kim } else if (ret) 5261c89128a0SJaegeuk Kim goto failed_mount4a; 5262ef7f3835SKalpak Shah 5263b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 526427dd4385SLukas Czerner 52650f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 52666fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 52676fd058f7STheodore Ts'o if (err) { 5268b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5269fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5270f9ae9cf5STheodore Ts'o goto failed_mount4a; 5271f9ae9cf5STheodore Ts'o } 52720f5bde1dSJan Kara } 52738016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5274f9ae9cf5STheodore Ts'o 5275f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5276196e402aSHarshad Shirwadkar 5277196e402aSHarshad Shirwadkar /* 5278196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5279196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5280196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5281196e402aSHarshad Shirwadkar */ 528227b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 528327b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5284196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 528527b38686SOjaswin Mujoo else 5286196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 528727b38686SOjaswin Mujoo } 5288196e402aSHarshad Shirwadkar 5289f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5290f9ae9cf5STheodore Ts'o if (err) { 5291f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5292f9ae9cf5STheodore Ts'o err); 5293dcf2d804STao Ma goto failed_mount5; 5294c2774d84SAneesh Kumar K.V } 5295c2774d84SAneesh Kumar K.V 5296027f14f5STheodore Ts'o /* 5297027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5298027f14f5STheodore Ts'o * mballoc is initialized 5299027f14f5STheodore Ts'o */ 5300027f14f5STheodore Ts'o if (sbi->s_journal) 5301027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5302027f14f5STheodore Ts'o ext4_journal_commit_callback; 5303027f14f5STheodore Ts'o 5304d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5305d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5306d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5307908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5308908c7f19STejun Heo GFP_KERNEL); 5309d5e03cbbSTheodore Ts'o if (!err) { 5310d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5311d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5312908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5313908c7f19STejun Heo GFP_KERNEL); 5314d5e03cbbSTheodore Ts'o } 5315d5e03cbbSTheodore Ts'o if (!err) 5316d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5317908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5318d5e03cbbSTheodore Ts'o if (!err) 5319908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5320908c7f19STejun Heo GFP_KERNEL); 5321c8585c6fSDaeho Jeong if (!err) 5322efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5323efc61345SEric Whitney GFP_KERNEL); 5324efc61345SEric Whitney if (!err) 5325bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5326c8585c6fSDaeho Jeong 5327d5e03cbbSTheodore Ts'o if (err) { 5328d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5329d5e03cbbSTheodore Ts'o goto failed_mount6; 5330d5e03cbbSTheodore Ts'o } 5331d5e03cbbSTheodore Ts'o 5332e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5333d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5334d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5335d5e03cbbSTheodore Ts'o "unable to initialize " 5336d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 53378f6840c4SYang Yingliang ret = -ENOMEM; 5338d5e03cbbSTheodore Ts'o goto failed_mount6; 5339d5e03cbbSTheodore Ts'o } 5340d5e03cbbSTheodore Ts'o 5341bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5342bfff6873SLukas Czerner if (err) 5343dcf2d804STao Ma goto failed_mount6; 5344bfff6873SLukas Czerner 5345b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5346dcf2d804STao Ma if (err) 5347dcf2d804STao Ma goto failed_mount7; 53483197ebdbSTheodore Ts'o 534902f310fcSJan Kara err = ext4_init_orphan_info(sb); 535002f310fcSJan Kara if (err) 535102f310fcSJan Kara goto failed_mount8; 53529b2ff357SJan Kara #ifdef CONFIG_QUOTA 53539b2ff357SJan Kara /* Enable quota usage during mount. */ 5354bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 53559b2ff357SJan Kara err = ext4_enable_quotas(sb); 53569b2ff357SJan Kara if (err) 535702f310fcSJan Kara goto failed_mount9; 53589b2ff357SJan Kara } 53599b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 53609b2ff357SJan Kara 5361bc71726cSzhangyi (F) /* 5362bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5363bc71726cSzhangyi (F) * used to detect the metadata async write error. 5364bc71726cSzhangyi (F) */ 5365bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5366bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5367bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5368bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5369617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5370617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5371617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 53729b6641ddSYe Bin /* 53739b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 53749b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 53759b6641ddSYe Bin * checksum in the buffer cache until it is written out and 53769b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 53779b6641ddSYe Bin * after it is mounted can fail. 53789b6641ddSYe Bin */ 53799b6641ddSYe Bin ext4_superblock_csum_set(sb); 53800390131bSFrank Mayhar if (needs_recovery) { 5381b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 538211215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 538311215630SJan Kara if (err) 538402f310fcSJan Kara goto failed_mount9; 53850390131bSFrank Mayhar } 53860390131bSFrank Mayhar 538770200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 538879add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 538970200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 539079add3a3SLukas Czerner 539166e61a9eSTheodore Ts'o if (es->s_error_count) 539266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5393ac27a0ecSDave Kleikamp 5394efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5395efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5396efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5397efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 53981cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 53991cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5400efbed4dcSTheodore Ts'o 5401ac27a0ecSDave Kleikamp return 0; 5402ac27a0ecSDave Kleikamp 5403617ba13bSMingming Cao cantfind_ext4: 5404ac27a0ecSDave Kleikamp if (!silent) 5405b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5406ac27a0ecSDave Kleikamp goto failed_mount; 5407ac27a0ecSDave Kleikamp 540802f310fcSJan Kara failed_mount9: 540902f310fcSJan Kara ext4_release_orphan_info(sb); 541072ba7450STheodore Ts'o failed_mount8: 5411ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5412cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5413dcf2d804STao Ma failed_mount7: 5414dcf2d804STao Ma ext4_unregister_li_request(sb); 5415dcf2d804STao Ma failed_mount6: 5416f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 54177c990728SSuraj Jitindar Singh rcu_read_lock(); 54187c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 54197c990728SSuraj Jitindar Singh if (flex_groups) { 54207c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 54217c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 54227c990728SSuraj Jitindar Singh kvfree(flex_groups); 54237c990728SSuraj Jitindar Singh } 54247c990728SSuraj Jitindar Singh rcu_read_unlock(); 5425d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5426d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5427d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5428d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5429efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5430bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 543100764937SAzat Khuzhin failed_mount5: 5432f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5433f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5434f9ae9cf5STheodore Ts'o failed_mount4a: 543594bf608aSAl Viro dput(sb->s_root); 543632a9bb57SManish Katiyar sb->s_root = NULL; 543794bf608aSAl Viro failed_mount4: 5438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 54392e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 54402e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 54414c0425ffSMingming Cao failed_mount_wq: 5442dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5443dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 544450c15df6SChengguang Xu 544547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 544647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 544750c15df6SChengguang Xu 54480390131bSFrank Mayhar if (sbi->s_journal) { 5449bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5450bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5451dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 545247b4a50bSJan Kara sbi->s_journal = NULL; 54530390131bSFrank Mayhar } 545450460fe8SDarrick J. Wong failed_mount3a: 5455d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5456eb68d0e2SZheng Liu failed_mount3: 5457bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5458c92dc856SJan Kara flush_work(&sbi->s_error_work); 54592a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5460618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5461ac27a0ecSDave Kleikamp failed_mount2: 54621d0c3924STheodore Ts'o rcu_read_lock(); 54631d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 5464ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 54651d0c3924STheodore Ts'o brelse(group_desc[i]); 54661d0c3924STheodore Ts'o kvfree(group_desc); 54671d0c3924STheodore Ts'o rcu_read_unlock(); 5468ac27a0ecSDave Kleikamp failed_mount: 54690441984aSDarrick J. Wong if (sbi->s_chksum_driver) 54700441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5471c83ad55eSGabriel Krisman Bertazi 54725298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5473f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5474c83ad55eSGabriel Krisman Bertazi #endif 5475c83ad55eSGabriel Krisman Bertazi 5476ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5477a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 54780ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5479ac27a0ecSDave Kleikamp #endif 5480ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5481afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5482ac27a0ecSDave Kleikamp brelse(bh); 5483afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5484ac27a0ecSDave Kleikamp out_fail: 5485ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 548607aa2ea1SLukas Czerner return err ? err : ret; 5487ac27a0ecSDave Kleikamp } 5488ac27a0ecSDave Kleikamp 5489cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 54907edfd85bSLukas Czerner { 5491cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 54927edfd85bSLukas Czerner struct ext4_sb_info *sbi; 54937edfd85bSLukas Czerner const char *descr; 5494cebe85d5SLukas Czerner int ret; 54957edfd85bSLukas Czerner 5496cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5497cebe85d5SLukas Czerner if (!sbi) 54987c268d4cSLukas Czerner return -ENOMEM; 5499cebe85d5SLukas Czerner 5500cebe85d5SLukas Czerner fc->s_fs_info = sbi; 55017edfd85bSLukas Czerner 55027edfd85bSLukas Czerner /* Cleanup superblock name */ 55037edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 55047edfd85bSLukas Czerner 55057edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5506cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5507cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 55087edfd85bSLukas Czerner 5509960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 55107edfd85bSLukas Czerner if (ret < 0) 55117edfd85bSLukas Czerner goto free_sbi; 55127edfd85bSLukas Czerner 5513cebe85d5SLukas Czerner if (sbi->s_journal) { 55147edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 55157edfd85bSLukas Czerner descr = " journalled data mode"; 55167edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 55177edfd85bSLukas Czerner descr = " ordered data mode"; 55187edfd85bSLukas Czerner else 55197edfd85bSLukas Czerner descr = " writeback data mode"; 55207edfd85bSLukas Czerner } else 55217edfd85bSLukas Czerner descr = "out journal"; 55227edfd85bSLukas Czerner 55237edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 55247edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5525cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 55267edfd85bSLukas Czerner 5527eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5528827891a3STheodore Ts'o ext4_update_overhead(sb, false); 55297edfd85bSLukas Czerner return 0; 5530cebe85d5SLukas Czerner 55317edfd85bSLukas Czerner free_sbi: 55327edfd85bSLukas Czerner ext4_free_sbi(sbi); 5533cebe85d5SLukas Czerner fc->s_fs_info = NULL; 55347edfd85bSLukas Czerner return ret; 55357edfd85bSLukas Czerner } 55367edfd85bSLukas Czerner 5537cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5538cebe85d5SLukas Czerner { 5539cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5540cebe85d5SLukas Czerner } 5541cebe85d5SLukas Czerner 5542ac27a0ecSDave Kleikamp /* 5543ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5544ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5545ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5546ac27a0ecSDave Kleikamp */ 5547617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5548ac27a0ecSDave Kleikamp { 5549617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5550ac27a0ecSDave Kleikamp 5551ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 555230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 555330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 55546866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5555ac27a0ecSDave Kleikamp 5556a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5557ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5558dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5559ac27a0ecSDave Kleikamp else 5560dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 55615bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 55625bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 55635bf5683aSHidehiro Kawai else 55645bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5565a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5566ac27a0ecSDave Kleikamp } 5567ac27a0ecSDave Kleikamp 5568c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5569ac27a0ecSDave Kleikamp unsigned int journal_inum) 5570ac27a0ecSDave Kleikamp { 5571ac27a0ecSDave Kleikamp struct inode *journal_inode; 5572ac27a0ecSDave Kleikamp 5573c6cb7e77SEric Whitney /* 5574c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5575c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5576c6cb7e77SEric Whitney * will try to delete it. 5577c6cb7e77SEric Whitney */ 55788a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 55791d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5580b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5581ac27a0ecSDave Kleikamp return NULL; 5582ac27a0ecSDave Kleikamp } 5583ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5584ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5585ac27a0ecSDave Kleikamp iput(journal_inode); 5586b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5587ac27a0ecSDave Kleikamp return NULL; 5588ac27a0ecSDave Kleikamp } 5589ac27a0ecSDave Kleikamp 55904978c659SJan Kara ext4_debug("Journal inode found at %p: %lld bytes\n", 5591ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 55921d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5593b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5594ac27a0ecSDave Kleikamp iput(journal_inode); 5595ac27a0ecSDave Kleikamp return NULL; 5596ac27a0ecSDave Kleikamp } 5597c6cb7e77SEric Whitney return journal_inode; 5598c6cb7e77SEric Whitney } 5599c6cb7e77SEric Whitney 5600c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5601c6cb7e77SEric Whitney unsigned int journal_inum) 5602c6cb7e77SEric Whitney { 5603c6cb7e77SEric Whitney struct inode *journal_inode; 5604c6cb7e77SEric Whitney journal_t *journal; 5605c6cb7e77SEric Whitney 560611215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 560711215630SJan Kara return NULL; 5608c6cb7e77SEric Whitney 5609c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5610c6cb7e77SEric Whitney if (!journal_inode) 5611c6cb7e77SEric Whitney return NULL; 5612ac27a0ecSDave Kleikamp 5613dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5614ac27a0ecSDave Kleikamp if (!journal) { 5615b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5616ac27a0ecSDave Kleikamp iput(journal_inode); 5617ac27a0ecSDave Kleikamp return NULL; 5618ac27a0ecSDave Kleikamp } 5619ac27a0ecSDave Kleikamp journal->j_private = sb; 5620617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5621ac27a0ecSDave Kleikamp return journal; 5622ac27a0ecSDave Kleikamp } 5623ac27a0ecSDave Kleikamp 5624617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5625ac27a0ecSDave Kleikamp dev_t j_dev) 5626ac27a0ecSDave Kleikamp { 5627ac27a0ecSDave Kleikamp struct buffer_head *bh; 5628ac27a0ecSDave Kleikamp journal_t *journal; 5629617ba13bSMingming Cao ext4_fsblk_t start; 5630617ba13bSMingming Cao ext4_fsblk_t len; 5631ac27a0ecSDave Kleikamp int hblock, blocksize; 5632617ba13bSMingming Cao ext4_fsblk_t sb_block; 5633ac27a0ecSDave Kleikamp unsigned long offset; 5634617ba13bSMingming Cao struct ext4_super_block *es; 5635ac27a0ecSDave Kleikamp struct block_device *bdev; 5636ac27a0ecSDave Kleikamp 563711215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 563811215630SJan Kara return NULL; 56390390131bSFrank Mayhar 5640b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5641ac27a0ecSDave Kleikamp if (bdev == NULL) 5642ac27a0ecSDave Kleikamp return NULL; 5643ac27a0ecSDave Kleikamp 5644ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5645e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5646ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5647b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5648b31e1552SEric Sandeen "blocksize too small for journal device"); 5649ac27a0ecSDave Kleikamp goto out_bdev; 5650ac27a0ecSDave Kleikamp } 5651ac27a0ecSDave Kleikamp 5652617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5653617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5654ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5655ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5656b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5657b31e1552SEric Sandeen "external journal"); 5658ac27a0ecSDave Kleikamp goto out_bdev; 5659ac27a0ecSDave Kleikamp } 5660ac27a0ecSDave Kleikamp 56612716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5662617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5663ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5664617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5665b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5666b31e1552SEric Sandeen "bad superblock"); 5667ac27a0ecSDave Kleikamp brelse(bh); 5668ac27a0ecSDave Kleikamp goto out_bdev; 5669ac27a0ecSDave Kleikamp } 5670ac27a0ecSDave Kleikamp 5671df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5672df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5673df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5674df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5675df4763beSDarrick J. Wong "corrupt superblock"); 5676df4763beSDarrick J. Wong brelse(bh); 5677df4763beSDarrick J. Wong goto out_bdev; 5678df4763beSDarrick J. Wong } 5679df4763beSDarrick J. Wong 5680617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5682ac27a0ecSDave Kleikamp brelse(bh); 5683ac27a0ecSDave Kleikamp goto out_bdev; 5684ac27a0ecSDave Kleikamp } 5685ac27a0ecSDave Kleikamp 5686bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5687ac27a0ecSDave Kleikamp start = sb_block + 1; 5688ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5689ac27a0ecSDave Kleikamp 5690dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5691ac27a0ecSDave Kleikamp start, len, blocksize); 5692ac27a0ecSDave Kleikamp if (!journal) { 5693b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5694ac27a0ecSDave Kleikamp goto out_bdev; 5695ac27a0ecSDave Kleikamp } 5696ac27a0ecSDave Kleikamp journal->j_private = sb; 56972d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5698b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5699ac27a0ecSDave Kleikamp goto out_journal; 5700ac27a0ecSDave Kleikamp } 5701ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5703b31e1552SEric Sandeen "user (unsupported) - %d", 5704ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5705ac27a0ecSDave Kleikamp goto out_journal; 5706ac27a0ecSDave Kleikamp } 5707ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5708617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5709ac27a0ecSDave Kleikamp return journal; 57100b8e58a1SAndreas Dilger 5711ac27a0ecSDave Kleikamp out_journal: 5712dab291afSMingming Cao jbd2_journal_destroy(journal); 5713ac27a0ecSDave Kleikamp out_bdev: 5714617ba13bSMingming Cao ext4_blkdev_put(bdev); 5715ac27a0ecSDave Kleikamp return NULL; 5716ac27a0ecSDave Kleikamp } 5717ac27a0ecSDave Kleikamp 5718617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5719617ba13bSMingming Cao struct ext4_super_block *es, 5720ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5721ac27a0ecSDave Kleikamp { 5722ac27a0ecSDave Kleikamp journal_t *journal; 5723ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5724ac27a0ecSDave Kleikamp dev_t journal_dev; 5725ac27a0ecSDave Kleikamp int err = 0; 5726ac27a0ecSDave Kleikamp int really_read_only; 5727273108faSLukas Czerner int journal_dev_ro; 5728ac27a0ecSDave Kleikamp 572911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 573011215630SJan Kara return -EFSCORRUPTED; 57310390131bSFrank Mayhar 5732ac27a0ecSDave Kleikamp if (journal_devnum && 5733ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5734b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5735b31e1552SEric Sandeen "numbers have changed"); 5736ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5737ac27a0ecSDave Kleikamp } else 5738ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5739ac27a0ecSDave Kleikamp 5740273108faSLukas Czerner if (journal_inum && journal_dev) { 5741273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5742273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5743273108faSLukas Czerner return -EINVAL; 5744273108faSLukas Czerner } 5745273108faSLukas Czerner 5746273108faSLukas Czerner if (journal_inum) { 5747273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5748273108faSLukas Czerner if (!journal) 5749273108faSLukas Czerner return -EINVAL; 5750273108faSLukas Czerner } else { 5751273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5752273108faSLukas Czerner if (!journal) 5753273108faSLukas Czerner return -EINVAL; 5754273108faSLukas Czerner } 5755273108faSLukas Czerner 5756273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5757273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5758273108faSLukas Czerner 5759273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5760273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5761273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5762273108faSLukas Czerner err = -EROFS; 5763273108faSLukas Czerner goto err_out; 5764273108faSLukas Czerner } 5765ac27a0ecSDave Kleikamp 5766ac27a0ecSDave Kleikamp /* 5767ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5768ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5769ac27a0ecSDave Kleikamp * can get read-write access to the device. 5770ac27a0ecSDave Kleikamp */ 5771e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5772bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5773b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5774b31e1552SEric Sandeen "required on readonly filesystem"); 5775ac27a0ecSDave Kleikamp if (really_read_only) { 5776b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5777d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5778d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5779273108faSLukas Czerner err = -EROFS; 5780273108faSLukas Czerner goto err_out; 5781ac27a0ecSDave Kleikamp } 5782b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5783b31e1552SEric Sandeen "be enabled during recovery"); 5784ac27a0ecSDave Kleikamp } 5785ac27a0ecSDave Kleikamp } 5786ac27a0ecSDave Kleikamp 578790576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5788b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 57894776004fSTheodore Ts'o 5790e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5791dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 57921c13d5c0STheodore Ts'o if (!err) { 57931c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 57941c13d5c0STheodore Ts'o if (save) 57951c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 57961c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5797dab291afSMingming Cao err = jbd2_journal_load(journal); 57981c13d5c0STheodore Ts'o if (save) 57991c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 58001c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 58011c13d5c0STheodore Ts'o kfree(save); 58021c13d5c0STheodore Ts'o } 5803ac27a0ecSDave Kleikamp 5804ac27a0ecSDave Kleikamp if (err) { 5805b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5806273108faSLukas Czerner goto err_out; 5807ac27a0ecSDave Kleikamp } 5808ac27a0ecSDave Kleikamp 5809617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 581011215630SJan Kara err = ext4_clear_journal_err(sb, es); 581111215630SJan Kara if (err) { 581211215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 581311215630SJan Kara jbd2_journal_destroy(journal); 581411215630SJan Kara return err; 581511215630SJan Kara } 5816ac27a0ecSDave Kleikamp 5817c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5818ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5819ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5820ac27a0ecSDave Kleikamp 5821ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 58224392fbc4SJan Kara ext4_commit_super(sb); 5823ac27a0ecSDave Kleikamp } 5824ac27a0ecSDave Kleikamp 5825ac27a0ecSDave Kleikamp return 0; 5826273108faSLukas Czerner 5827273108faSLukas Czerner err_out: 5828273108faSLukas Czerner jbd2_journal_destroy(journal); 5829273108faSLukas Czerner return err; 5830ac27a0ecSDave Kleikamp } 5831ac27a0ecSDave Kleikamp 58322d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 58332d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5834ac27a0ecSDave Kleikamp { 5835c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5836e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5837e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5838ac27a0ecSDave Kleikamp 583905c2c00fSJan Kara lock_buffer(sbh); 5840a17712c8SJon Derrick /* 584171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 584271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 584371290b36STheodore Ts'o * write time when we are mounting the root file system 584471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 584571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 584671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 584771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 584871290b36STheodore Ts'o * to complain and force a full file system check. 584971290b36STheodore Ts'o */ 58501751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 58516a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5852afc32f7eSTheodore Ts'o es->s_kbytes_written = 5853e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 58548446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5855e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5856e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 585757042651STheodore Ts'o ext4_free_blocks_count_set(es, 5858e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5859e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5860e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 58617f93cff9STheodore Ts'o es->s_free_inodes_count = 58627f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5863e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5864c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5865c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5866c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5867c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5868c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5869c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5870c92dc856SJan Kara &es->s_first_error_time_hi, 5871c92dc856SJan Kara sbi->s_first_error_time); 5872c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5873c92dc856SJan Kara sizeof(es->s_first_error_func)); 5874c92dc856SJan Kara es->s_first_error_line = 5875c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5876c92dc856SJan Kara es->s_first_error_ino = 5877c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5878c92dc856SJan Kara es->s_first_error_block = 5879c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5880c92dc856SJan Kara es->s_first_error_errcode = 5881c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5882c92dc856SJan Kara } 5883c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5884c92dc856SJan Kara &es->s_last_error_time_hi, 5885c92dc856SJan Kara sbi->s_last_error_time); 5886c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5887c92dc856SJan Kara sizeof(es->s_last_error_func)); 5888c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5889c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5890c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5891c92dc856SJan Kara es->s_last_error_errcode = 5892c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5893c92dc856SJan Kara /* 5894c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5895c92dc856SJan Kara * started already 5896c92dc856SJan Kara */ 5897c92dc856SJan Kara if (!es->s_error_count) 5898c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5899c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5900c92dc856SJan Kara sbi->s_add_error_count = 0; 5901c92dc856SJan Kara } 5902c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5903c92dc856SJan Kara 590406db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 59052d01ddc8SJan Kara unlock_buffer(sbh); 59062d01ddc8SJan Kara } 59072d01ddc8SJan Kara 59082d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 59092d01ddc8SJan Kara { 59102d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 59112d01ddc8SJan Kara 5912f88f1466SFengnan Chang if (!sbh) 5913f88f1466SFengnan Chang return -EINVAL; 5914f88f1466SFengnan Chang if (block_device_ejected(sb)) 5915f88f1466SFengnan Chang return -ENODEV; 59162d01ddc8SJan Kara 59172d01ddc8SJan Kara ext4_update_super(sb); 59182d01ddc8SJan Kara 591915baa7dcSZhang Yi lock_buffer(sbh); 592015baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 592115baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 592215baa7dcSZhang Yi unlock_buffer(sbh); 592315baa7dcSZhang Yi return -EIO; 592415baa7dcSZhang Yi } 592515baa7dcSZhang Yi 5926e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 59274743f839SPranay Kr. Srivastava /* 59284743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 59294743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 59304743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 59314743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 59324743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 59334743f839SPranay Kr. Srivastava * write and hope for the best. 59344743f839SPranay Kr. Srivastava */ 59354743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 59364743f839SPranay Kr. Srivastava "superblock detected"); 59374743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 59384743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 59394743f839SPranay Kr. Srivastava } 594015baa7dcSZhang Yi get_bh(sbh); 594115baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 594215baa7dcSZhang Yi clear_buffer_dirty(sbh); 594315baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 59441420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 59451420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 594615baa7dcSZhang Yi wait_on_buffer(sbh); 5947c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5948b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5949b31e1552SEric Sandeen "superblock"); 5950914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5951914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 595215baa7dcSZhang Yi return -EIO; 5953914258bfSTheodore Ts'o } 595415baa7dcSZhang Yi return 0; 5955ac27a0ecSDave Kleikamp } 5956ac27a0ecSDave Kleikamp 5957ac27a0ecSDave Kleikamp /* 5958ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5959ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5960ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5961ac27a0ecSDave Kleikamp */ 596211215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5963617ba13bSMingming Cao struct ext4_super_block *es) 5964ac27a0ecSDave Kleikamp { 596511215630SJan Kara int err; 5966617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5967ac27a0ecSDave Kleikamp 5968e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 596911215630SJan Kara if (journal != NULL) { 597011215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 597111215630SJan Kara "mounted!"); 597211215630SJan Kara return -EFSCORRUPTED; 597311215630SJan Kara } 597411215630SJan Kara return 0; 59750390131bSFrank Mayhar } 5976dab291afSMingming Cao jbd2_journal_lock_updates(journal); 597701d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 597811215630SJan Kara if (err < 0) 59797ffe1ea8SHidehiro Kawai goto out; 59807ffe1ea8SHidehiro Kawai 598102f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 598202f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 598302f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 598402f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 598502f310fcSJan Kara err = -EFSCORRUPTED; 598602f310fcSJan Kara goto out; 598702f310fcSJan Kara } 5988e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 598902f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 59904392fbc4SJan Kara ext4_commit_super(sb); 5991ac27a0ecSDave Kleikamp } 59927ffe1ea8SHidehiro Kawai out: 5993dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 599411215630SJan Kara return err; 5995ac27a0ecSDave Kleikamp } 5996ac27a0ecSDave Kleikamp 5997ac27a0ecSDave Kleikamp /* 5998ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5999ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6000ac27a0ecSDave Kleikamp * main filesystem now. 6001ac27a0ecSDave Kleikamp */ 600211215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6003617ba13bSMingming Cao struct ext4_super_block *es) 6004ac27a0ecSDave Kleikamp { 6005ac27a0ecSDave Kleikamp journal_t *journal; 6006ac27a0ecSDave Kleikamp int j_errno; 6007ac27a0ecSDave Kleikamp const char *errstr; 6008ac27a0ecSDave Kleikamp 600911215630SJan Kara if (!ext4_has_feature_journal(sb)) { 601011215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 601111215630SJan Kara return -EFSCORRUPTED; 601211215630SJan Kara } 60130390131bSFrank Mayhar 6014617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6015ac27a0ecSDave Kleikamp 6016ac27a0ecSDave Kleikamp /* 6017ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6018617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6019ac27a0ecSDave Kleikamp */ 6020ac27a0ecSDave Kleikamp 6021dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6022ac27a0ecSDave Kleikamp if (j_errno) { 6023ac27a0ecSDave Kleikamp char nbuf[16]; 6024ac27a0ecSDave Kleikamp 6025617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 602612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6027ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 602812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6029ac27a0ecSDave Kleikamp 6030617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6031617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 60324392fbc4SJan Kara ext4_commit_super(sb); 6033ac27a0ecSDave Kleikamp 6034dab291afSMingming Cao jbd2_journal_clear_err(journal); 6035d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6036ac27a0ecSDave Kleikamp } 603711215630SJan Kara return 0; 6038ac27a0ecSDave Kleikamp } 6039ac27a0ecSDave Kleikamp 6040ac27a0ecSDave Kleikamp /* 6041ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6042ac27a0ecSDave Kleikamp * and wait on the commit. 6043ac27a0ecSDave Kleikamp */ 6044617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6045ac27a0ecSDave Kleikamp { 6046ac27a0ecSDave Kleikamp journal_t *journal; 6047ac27a0ecSDave Kleikamp 6048bc98a42cSDavid Howells if (sb_rdonly(sb)) 6049ac27a0ecSDave Kleikamp return 0; 6050ac27a0ecSDave Kleikamp 6051617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6052b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6053ac27a0ecSDave Kleikamp } 6054ac27a0ecSDave Kleikamp 6055617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6056ac27a0ecSDave Kleikamp { 605714ce0cb4STheodore Ts'o int ret = 0; 60589eddacf9SJan Kara tid_t target; 605906a407f1SDmitry Monakhov bool needs_barrier = false; 60608d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6061ac27a0ecSDave Kleikamp 606249598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 60630db1ff22STheodore Ts'o return 0; 60640db1ff22STheodore Ts'o 60659bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 60662e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6067a1177825SJan Kara /* 6068a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6069a1177825SJan Kara * no dirty dquots 6070a1177825SJan Kara */ 6071a1177825SJan Kara dquot_writeback_dquots(sb, -1); 607206a407f1SDmitry Monakhov /* 607306a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 607406a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 607506a407f1SDmitry Monakhov * transaction_commit will do it for us. 607606a407f1SDmitry Monakhov */ 6077bda32530STheodore Ts'o if (sbi->s_journal) { 607806a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 607906a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 608006a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 608106a407f1SDmitry Monakhov needs_barrier = true; 608206a407f1SDmitry Monakhov 60838d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6084ac27a0ecSDave Kleikamp if (wait) 6085bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6086bda32530STheodore Ts'o target); 60870390131bSFrank Mayhar } 6088bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6089bda32530STheodore Ts'o needs_barrier = true; 609006a407f1SDmitry Monakhov if (needs_barrier) { 609106a407f1SDmitry Monakhov int err; 6092c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 609306a407f1SDmitry Monakhov if (!ret) 609406a407f1SDmitry Monakhov ret = err; 609506a407f1SDmitry Monakhov } 609606a407f1SDmitry Monakhov 609706a407f1SDmitry Monakhov return ret; 609806a407f1SDmitry Monakhov } 609906a407f1SDmitry Monakhov 6100ac27a0ecSDave Kleikamp /* 6101ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6102ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6103be4f27d3SYongqiang Yang * 6104be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 61058e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 61068e8ad8a5SJan Kara * modifications. 6107ac27a0ecSDave Kleikamp */ 6108c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6109ac27a0ecSDave Kleikamp { 6110c4be0c1dSTakashi Sato int error = 0; 6111c4be0c1dSTakashi Sato journal_t *journal; 6112ac27a0ecSDave Kleikamp 6113bc98a42cSDavid Howells if (sb_rdonly(sb)) 61149ca92389STheodore Ts'o return 0; 61159ca92389STheodore Ts'o 6116c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6117ac27a0ecSDave Kleikamp 6118bb044576STheodore Ts'o if (journal) { 6119ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6120dab291afSMingming Cao jbd2_journal_lock_updates(journal); 61217ffe1ea8SHidehiro Kawai 61227ffe1ea8SHidehiro Kawai /* 6123bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6124bb044576STheodore Ts'o * flush the journal. 61257ffe1ea8SHidehiro Kawai */ 612601d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 61276b0310fbSEric Sandeen if (error < 0) 61286b0310fbSEric Sandeen goto out; 6129ac27a0ecSDave Kleikamp 6130ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6131e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 613202f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 613302f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6134c642dc9eSEric Sandeen } 6135c642dc9eSEric Sandeen 61364392fbc4SJan Kara error = ext4_commit_super(sb); 61376b0310fbSEric Sandeen out: 6138bb044576STheodore Ts'o if (journal) 61398e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6140bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 61416b0310fbSEric Sandeen return error; 6142ac27a0ecSDave Kleikamp } 6143ac27a0ecSDave Kleikamp 6144ac27a0ecSDave Kleikamp /* 6145ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6146ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6147ac27a0ecSDave Kleikamp */ 6148c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6149ac27a0ecSDave Kleikamp { 6150bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 61519ca92389STheodore Ts'o return 0; 61529ca92389STheodore Ts'o 6153c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 61549ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6155e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 615602f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 615702f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6158c642dc9eSEric Sandeen } 6159c642dc9eSEric Sandeen 61604392fbc4SJan Kara ext4_commit_super(sb); 6161c4be0c1dSTakashi Sato return 0; 6162ac27a0ecSDave Kleikamp } 6163ac27a0ecSDave Kleikamp 6164673c6100STheodore Ts'o /* 6165673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6166673c6100STheodore Ts'o */ 6167673c6100STheodore Ts'o struct ext4_mount_options { 6168673c6100STheodore Ts'o unsigned long s_mount_opt; 6169a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 617008cefc7aSEric W. Biederman kuid_t s_resuid; 617108cefc7aSEric W. Biederman kgid_t s_resgid; 6172673c6100STheodore Ts'o unsigned long s_commit_interval; 6173673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6174673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6175673c6100STheodore Ts'o int s_jquota_fmt; 6176a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6177673c6100STheodore Ts'o #endif 6178673c6100STheodore Ts'o }; 6179673c6100STheodore Ts'o 6180960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6181ac27a0ecSDave Kleikamp { 61827edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6183617ba13bSMingming Cao struct ext4_super_block *es; 6184617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6185960e0ab6SLukas Czerner unsigned long old_sb_flags; 6186617ba13bSMingming Cao struct ext4_mount_options old_opts; 61878a266467STheodore Ts'o ext4_group_t g; 6188c5e06d10SJohann Lombardi int err = 0; 6189ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 61903bbef91bSAustin Kim int enable_quota = 0; 619103dafb5fSChen Gang int i, j; 619233458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6193ac27a0ecSDave Kleikamp #endif 6194b237e304SHarshad Shirwadkar 619521ac738eSChengguang Xu 6196ac27a0ecSDave Kleikamp /* Store the original options */ 6197ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6198ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6199a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6200ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6201ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6202ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 620330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 620430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6205ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6206ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6207a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 620803dafb5fSChen Gang if (sbi->s_qf_names[i]) { 620933458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 621033458eabSTheodore Ts'o 621133458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 621203dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 621303dafb5fSChen Gang for (j = 0; j < i; j++) 621403dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 621503dafb5fSChen Gang return -ENOMEM; 621603dafb5fSChen Gang } 621703dafb5fSChen Gang } else 621803dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6219ac27a0ecSDave Kleikamp #endif 6220e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6221b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 62227edfd85bSLukas Czerner ctx->journal_ioprio = 6223b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6224e4e58e5dSOjaswin Mujoo else 6225e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6226e4e58e5dSOjaswin Mujoo 6227e4e58e5dSOjaswin Mujoo } 6228ac27a0ecSDave Kleikamp 62297edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6230ac27a0ecSDave Kleikamp 62316b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 62326b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 62336b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 62342d5b86e0SEric Sandeen "during remount not supported; ignoring"); 62352d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6236c6d3d56dSDarrick J. Wong } 6237c6d3d56dSDarrick J. Wong 62386ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 62396ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 62406ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62416ae6514bSPiotr Sarna "both data=journal and delalloc"); 62426ae6514bSPiotr Sarna err = -EINVAL; 62436ae6514bSPiotr Sarna goto restore_opts; 62446ae6514bSPiotr Sarna } 62456ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 62466ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 62476ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 62486ae6514bSPiotr Sarna err = -EINVAL; 62496ae6514bSPiotr Sarna goto restore_opts; 62506ae6514bSPiotr Sarna } 6251ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6252ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6253ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6254ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6255ab04df78SJan Kara err = -EINVAL; 6256ab04df78SJan Kara goto restore_opts; 6257ab04df78SJan Kara } 6258923ae0ffSRoss Zwisler } 6259923ae0ffSRoss Zwisler 6260cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6261cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6262cdb7ee4cSTahsin Erdogan err = -EINVAL; 6263cdb7ee4cSTahsin Erdogan goto restore_opts; 6264cdb7ee4cSTahsin Erdogan } 6265cdb7ee4cSTahsin Erdogan 62669b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6267124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6268ac27a0ecSDave Kleikamp 62691751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 62701751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6271ac27a0ecSDave Kleikamp 6272ac27a0ecSDave Kleikamp es = sbi->s_es; 6273ac27a0ecSDave Kleikamp 6274b3881f74STheodore Ts'o if (sbi->s_journal) { 6275617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 62767edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6277b3881f74STheodore Ts'o } 6278ac27a0ecSDave Kleikamp 6279c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6280c92dc856SJan Kara flush_work(&sbi->s_error_work); 6281c92dc856SJan Kara 6282960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 62839b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6284ac27a0ecSDave Kleikamp err = -EROFS; 6285ac27a0ecSDave Kleikamp goto restore_opts; 6286ac27a0ecSDave Kleikamp } 6287ac27a0ecSDave Kleikamp 6288960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 628938c03b34STheodore Ts'o err = sync_filesystem(sb); 629038c03b34STheodore Ts'o if (err < 0) 629138c03b34STheodore Ts'o goto restore_opts; 62920f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 62930f0dd62fSChristoph Hellwig if (err < 0) 6294c79d967dSChristoph Hellwig goto restore_opts; 6295c79d967dSChristoph Hellwig 6296ac27a0ecSDave Kleikamp /* 6297ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6298ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6299ac27a0ecSDave Kleikamp */ 63001751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6301ac27a0ecSDave Kleikamp 6302ac27a0ecSDave Kleikamp /* 6303ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6304ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6305ac27a0ecSDave Kleikamp * mark the partition as valid again. 6306ac27a0ecSDave Kleikamp */ 6307617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6308617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6309ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6310ac27a0ecSDave Kleikamp 631111215630SJan Kara if (sbi->s_journal) { 631211215630SJan Kara /* 631311215630SJan Kara * We let remount-ro finish even if marking fs 631411215630SJan Kara * as clean failed... 631511215630SJan Kara */ 6316617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 631711215630SJan Kara } 6318ac27a0ecSDave Kleikamp } else { 6319a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6320e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 63212cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6322ac27a0ecSDave Kleikamp err = -EROFS; 6323ac27a0ecSDave Kleikamp goto restore_opts; 6324ac27a0ecSDave Kleikamp } 6325ead6596bSEric Sandeen /* 63268a266467STheodore Ts'o * Make sure the group descriptor checksums 63270b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 63288a266467STheodore Ts'o */ 63298a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 63308a266467STheodore Ts'o struct ext4_group_desc *gdp = 63318a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 63328a266467STheodore Ts'o 6333feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6334b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6335b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6336e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 63378a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 63386a797d27SDarrick J. Wong err = -EFSBADCRC; 63398a266467STheodore Ts'o goto restore_opts; 63408a266467STheodore Ts'o } 63418a266467STheodore Ts'o } 63428a266467STheodore Ts'o 63438a266467STheodore Ts'o /* 6344ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6345ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6346ead6596bSEric Sandeen * require a full umount/remount for now. 6347ead6596bSEric Sandeen */ 634802f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6349b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6350ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6351ead6596bSEric Sandeen "orphan inode list. Please " 6352b31e1552SEric Sandeen "umount/remount instead"); 6353ead6596bSEric Sandeen err = -EINVAL; 6354ead6596bSEric Sandeen goto restore_opts; 6355ead6596bSEric Sandeen } 6356ead6596bSEric Sandeen 6357ac27a0ecSDave Kleikamp /* 6358ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6359ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6360ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6361ac27a0ecSDave Kleikamp * the partition.) 6362ac27a0ecSDave Kleikamp */ 636311215630SJan Kara if (sbi->s_journal) { 636411215630SJan Kara err = ext4_clear_journal_err(sb, es); 636511215630SJan Kara if (err) 636611215630SJan Kara goto restore_opts; 636711215630SJan Kara } 6368c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6369c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6370c89128a0SJaegeuk Kim 6371c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6372c89128a0SJaegeuk Kim if (err) 6373c89128a0SJaegeuk Kim goto restore_opts; 6374c89128a0SJaegeuk Kim 63751751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6376e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6377c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6378c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6379c5e06d10SJohann Lombardi err = -EROFS; 6380c5e06d10SJohann Lombardi goto restore_opts; 6381c5e06d10SJohann Lombardi } 63823bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6383c79d967dSChristoph Hellwig enable_quota = 1; 63843bbef91bSAustin Kim #endif 6385ac27a0ecSDave Kleikamp } 6386ac27a0ecSDave Kleikamp } 6387bfff6873SLukas Czerner 6388bfff6873SLukas Czerner /* 6389bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6390bfff6873SLukas Czerner * current settings 6391bfff6873SLukas Czerner */ 6392bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6393bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6394bfff6873SLukas Czerner else { 6395bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6396bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6397bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6398bfff6873SLukas Czerner } 6399bfff6873SLukas Czerner 64000f5bde1dSJan Kara /* 64010f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 64020f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 64030f5bde1dSJan Kara * succeed. 64040f5bde1dSJan Kara */ 6405dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6406d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6407d176b1f6SJan Kara if (err) 6408d176b1f6SJan Kara goto restore_opts; 64090f5bde1dSJan Kara } 6410d176b1f6SJan Kara 6411c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64124392fbc4SJan Kara err = ext4_commit_super(sb); 6413c89128a0SJaegeuk Kim if (err) 6414c89128a0SJaegeuk Kim goto restore_opts; 6415c89128a0SJaegeuk Kim } 64160390131bSFrank Mayhar 6417ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6418ac27a0ecSDave Kleikamp /* Release old quota file names */ 6419a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6420ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 64217c319d32SAditya Kali if (enable_quota) { 64227c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 64230f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6424e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 64257c319d32SAditya Kali err = ext4_enable_quotas(sb); 642607724f98STheodore Ts'o if (err) 64277c319d32SAditya Kali goto restore_opts; 64287c319d32SAditya Kali } 64297c319d32SAditya Kali } 64307c319d32SAditya Kali #endif 6431dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64320f5bde1dSJan Kara ext4_release_system_zone(sb); 6433d4c402d9SCurt Wohlgemuth 643461bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 643561bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 643661bb4a1cSTheodore Ts'o 6437ac27a0ecSDave Kleikamp return 0; 64380b8e58a1SAndreas Dilger 6439ac27a0ecSDave Kleikamp restore_opts: 6440ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6441ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6442a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6443ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6444ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6445ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 644630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 644730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6448dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 64490f5bde1dSJan Kara ext4_release_system_zone(sb); 6450ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6451ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6452a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 645333458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 645433458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6455ac27a0ecSDave Kleikamp } 645633458eabSTheodore Ts'o synchronize_rcu(); 645733458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 645833458eabSTheodore Ts'o kfree(to_free[i]); 6459ac27a0ecSDave Kleikamp #endif 646061bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 646161bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6462ac27a0ecSDave Kleikamp return err; 6463ac27a0ecSDave Kleikamp } 6464ac27a0ecSDave Kleikamp 6465cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 64667edfd85bSLukas Czerner { 6467cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 64687edfd85bSLukas Czerner int ret; 64697edfd85bSLukas Czerner 6470cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 64717edfd85bSLukas Czerner 6472cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 64737edfd85bSLukas Czerner if (ret < 0) 64747edfd85bSLukas Czerner return ret; 6475cebe85d5SLukas Czerner 6476960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6477cebe85d5SLukas Czerner if (ret < 0) 6478cebe85d5SLukas Czerner return ret; 6479cebe85d5SLukas Czerner 6480cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6481cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6482cebe85d5SLukas Czerner 6483cebe85d5SLukas Czerner return 0; 64847edfd85bSLukas Czerner } 64857edfd85bSLukas Czerner 6486689c958cSLi Xi #ifdef CONFIG_QUOTA 6487689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6488689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6489689c958cSLi Xi { 6490689c958cSLi Xi struct kqid qid; 6491689c958cSLi Xi struct dquot *dquot; 6492689c958cSLi Xi u64 limit; 6493689c958cSLi Xi u64 curblock; 6494689c958cSLi Xi 6495689c958cSLi Xi qid = make_kqid_projid(projid); 6496689c958cSLi Xi dquot = dqget(sb, qid); 6497689c958cSLi Xi if (IS_ERR(dquot)) 6498689c958cSLi Xi return PTR_ERR(dquot); 64997b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6500689c958cSLi Xi 6501a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6502a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 650357c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 650457c32ea4SChengguang Xu 6505689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6506f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6507f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6508689c958cSLi Xi buf->f_blocks = limit; 6509689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6510689c958cSLi Xi (buf->f_blocks > curblock) ? 6511689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6512689c958cSLi Xi } 6513689c958cSLi Xi 6514a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6515a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6516689c958cSLi Xi if (limit && buf->f_files > limit) { 6517689c958cSLi Xi buf->f_files = limit; 6518689c958cSLi Xi buf->f_ffree = 6519689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6520689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6521689c958cSLi Xi } 6522689c958cSLi Xi 65237b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6524689c958cSLi Xi dqput(dquot); 6525689c958cSLi Xi return 0; 6526689c958cSLi Xi } 6527689c958cSLi Xi #endif 6528689c958cSLi Xi 6529617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6530ac27a0ecSDave Kleikamp { 6531ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6532617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6533617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 653427dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6535d02a9391SKazuya Mio s64 bfree; 653627dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6537ac27a0ecSDave Kleikamp 6538952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6539952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6540ac27a0ecSDave Kleikamp 6541617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6542ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6543b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 654457042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 654557042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6546d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 654757042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 654827dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 654927dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 655027dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6551ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6552ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 655352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6554617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 65559591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 65560b8e58a1SAndreas Dilger 6557689c958cSLi Xi #ifdef CONFIG_QUOTA 6558689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6559689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6560689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6561689c958cSLi Xi #endif 6562ac27a0ecSDave Kleikamp return 0; 6563ac27a0ecSDave Kleikamp } 6564ac27a0ecSDave Kleikamp 6565ac27a0ecSDave Kleikamp 6566ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6567ac27a0ecSDave Kleikamp 6568bc8230eeSJan Kara /* 6569bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6570bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6571bc8230eeSJan Kara */ 6572ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6573ac27a0ecSDave Kleikamp { 65744c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6575ac27a0ecSDave Kleikamp } 6576ac27a0ecSDave Kleikamp 6577617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6578ac27a0ecSDave Kleikamp { 6579ac27a0ecSDave Kleikamp int ret, err; 6580ac27a0ecSDave Kleikamp handle_t *handle; 6581ac27a0ecSDave Kleikamp struct inode *inode; 6582ac27a0ecSDave Kleikamp 6583ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 65849924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6585617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6586ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6587ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6588ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6589617ba13bSMingming Cao err = ext4_journal_stop(handle); 6590ac27a0ecSDave Kleikamp if (!ret) 6591ac27a0ecSDave Kleikamp ret = err; 6592ac27a0ecSDave Kleikamp return ret; 6593ac27a0ecSDave Kleikamp } 6594ac27a0ecSDave Kleikamp 6595617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6596ac27a0ecSDave Kleikamp { 6597ac27a0ecSDave Kleikamp int ret, err; 6598ac27a0ecSDave Kleikamp handle_t *handle; 6599ac27a0ecSDave Kleikamp 66009924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6601617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6602ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6603ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6604ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6605617ba13bSMingming Cao err = ext4_journal_stop(handle); 6606ac27a0ecSDave Kleikamp if (!ret) 6607ac27a0ecSDave Kleikamp ret = err; 6608ac27a0ecSDave Kleikamp return ret; 6609ac27a0ecSDave Kleikamp } 6610ac27a0ecSDave Kleikamp 6611617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6612ac27a0ecSDave Kleikamp { 6613ac27a0ecSDave Kleikamp int ret, err; 6614ac27a0ecSDave Kleikamp handle_t *handle; 6615ac27a0ecSDave Kleikamp 66169924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6617617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 66189c3013e9SJan Kara if (IS_ERR(handle)) { 66199c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 66209c3013e9SJan Kara dquot_release(dquot); 6621ac27a0ecSDave Kleikamp return PTR_ERR(handle); 66229c3013e9SJan Kara } 6623ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6624617ba13bSMingming Cao err = ext4_journal_stop(handle); 6625ac27a0ecSDave Kleikamp if (!ret) 6626ac27a0ecSDave Kleikamp ret = err; 6627ac27a0ecSDave Kleikamp return ret; 6628ac27a0ecSDave Kleikamp } 6629ac27a0ecSDave Kleikamp 6630617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6631ac27a0ecSDave Kleikamp { 6632262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6633262b4662SJan Kara 6634f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6635ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6636617ba13bSMingming Cao return ext4_write_dquot(dquot); 6637ac27a0ecSDave Kleikamp } else { 6638ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6639ac27a0ecSDave Kleikamp } 6640ac27a0ecSDave Kleikamp } 6641ac27a0ecSDave Kleikamp 6642617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6643ac27a0ecSDave Kleikamp { 6644ac27a0ecSDave Kleikamp int ret, err; 6645ac27a0ecSDave Kleikamp handle_t *handle; 6646ac27a0ecSDave Kleikamp 6647ac27a0ecSDave Kleikamp /* Data block + inode block */ 6648f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6649ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6650ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6651ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6652617ba13bSMingming Cao err = ext4_journal_stop(handle); 6653ac27a0ecSDave Kleikamp if (!ret) 6654ac27a0ecSDave Kleikamp ret = err; 6655ac27a0ecSDave Kleikamp return ret; 6656ac27a0ecSDave Kleikamp } 6657ac27a0ecSDave Kleikamp 6658daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6659daf647d2STheodore Ts'o { 6660daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6661daf647d2STheodore Ts'o 6662daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6663daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6664daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6665daf647d2STheodore Ts'o * because the name of the lock is set using the 6666daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6667daf647d2STheodore Ts'o */ 6668daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6669daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6670daf647d2STheodore Ts'o } 6671daf647d2STheodore Ts'o 6672ac27a0ecSDave Kleikamp /* 6673ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6674ac27a0ecSDave Kleikamp */ 6675617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 66768c54ca9cSAl Viro const struct path *path) 6677ac27a0ecSDave Kleikamp { 6678ac27a0ecSDave Kleikamp int err; 6679ac27a0ecSDave Kleikamp 6680ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6681ac27a0ecSDave Kleikamp return -EINVAL; 66820623543bSJan Kara 6683ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6684d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6685ac27a0ecSDave Kleikamp return -EXDEV; 6686e0770e91SJan Kara 6687e0770e91SJan Kara /* Quota already enabled for this file? */ 6688e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6689e0770e91SJan Kara return -EBUSY; 6690e0770e91SJan Kara 66910623543bSJan Kara /* Journaling quota? */ 66920623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 66932b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6694f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6695b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6696b31e1552SEric Sandeen "Quota file not on filesystem root. " 6697b31e1552SEric Sandeen "Journaled quota will not work"); 669891389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 669991389240SJan Kara } else { 670091389240SJan Kara /* 670191389240SJan Kara * Clear the flag just in case mount options changed since 670291389240SJan Kara * last time. 670391389240SJan Kara */ 670491389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 67050623543bSJan Kara } 67060623543bSJan Kara 67070623543bSJan Kara /* 67080623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 67090623543bSJan Kara * all updates to the file when we bypass pagecache... 67100623543bSJan Kara */ 67110390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67122b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 67130623543bSJan Kara /* 67140623543bSJan Kara * We don't need to lock updates but journal_flush() could 67150623543bSJan Kara * otherwise be livelocked... 67160623543bSJan Kara */ 67170623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 671801d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 67190623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6720f00c9e44SJan Kara if (err) 67217ffe1ea8SHidehiro Kawai return err; 67227ffe1ea8SHidehiro Kawai } 6723957153fcSJan Kara 6724daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6725daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 672615fc69bbSJan Kara if (!err) { 6727957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6728957153fcSJan Kara handle_t *handle; 6729957153fcSJan Kara 673061a92987SJan Kara /* 673161a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 673261a92987SJan Kara * files. If this fails, we return success anyway since quotas 673361a92987SJan Kara * are already enabled and this is not a hard failure. 673461a92987SJan Kara */ 6735957153fcSJan Kara inode_lock(inode); 6736957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6737957153fcSJan Kara if (IS_ERR(handle)) 6738957153fcSJan Kara goto unlock_inode; 6739957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6740957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6741957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 67424209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6743957153fcSJan Kara ext4_journal_stop(handle); 6744957153fcSJan Kara unlock_inode: 6745957153fcSJan Kara inode_unlock(inode); 674615fc69bbSJan Kara if (err) 674715fc69bbSJan Kara dquot_quota_off(sb, type); 6748957153fcSJan Kara } 674915fc69bbSJan Kara if (err) 675015fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 675115fc69bbSJan Kara I_DATA_SEM_NORMAL); 6752daf647d2STheodore Ts'o return err; 6753ac27a0ecSDave Kleikamp } 6754ac27a0ecSDave Kleikamp 67557c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 67567c319d32SAditya Kali unsigned int flags) 67577c319d32SAditya Kali { 67587c319d32SAditya Kali int err; 67597c319d32SAditya Kali struct inode *qf_inode; 6760a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 67617c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6762689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6763689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 67647c319d32SAditya Kali }; 67657c319d32SAditya Kali 6766e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 67677c319d32SAditya Kali 67687c319d32SAditya Kali if (!qf_inums[type]) 67697c319d32SAditya Kali return -EPERM; 67707c319d32SAditya Kali 67718a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 67727c319d32SAditya Kali if (IS_ERR(qf_inode)) { 67737c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 67747c319d32SAditya Kali return PTR_ERR(qf_inode); 67757c319d32SAditya Kali } 67767c319d32SAditya Kali 6777bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6778bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6779daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 67807212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6781daf647d2STheodore Ts'o if (err) 6782daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 678361157b24SPan Bian iput(qf_inode); 67847c319d32SAditya Kali 67857c319d32SAditya Kali return err; 67867c319d32SAditya Kali } 67877c319d32SAditya Kali 67887c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 678925c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 67907c319d32SAditya Kali { 67917c319d32SAditya Kali int type, err = 0; 6792a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 67937c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6794689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6795689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 67967c319d32SAditya Kali }; 679749da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 679849da9392SJan Kara test_opt(sb, USRQUOTA), 679949da9392SJan Kara test_opt(sb, GRPQUOTA), 680049da9392SJan Kara test_opt(sb, PRJQUOTA), 680149da9392SJan Kara }; 68027c319d32SAditya Kali 680391389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6804a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 68057c319d32SAditya Kali if (qf_inums[type]) { 68067c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 680749da9392SJan Kara DQUOT_USAGE_ENABLED | 680849da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 68097c319d32SAditya Kali if (err) { 68107c319d32SAditya Kali ext4_warning(sb, 681172ba7450STheodore Ts'o "Failed to enable quota tracking " 681272ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 681372ba7450STheodore Ts'o "e2fsck to fix.", type, err); 68144013d47aSJan Kara for (type--; type >= 0; type--) { 68154013d47aSJan Kara struct inode *inode; 68164013d47aSJan Kara 68174013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 68184013d47aSJan Kara if (inode) 68194013d47aSJan Kara inode = igrab(inode); 68207f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 68214013d47aSJan Kara if (inode) { 68224013d47aSJan Kara lockdep_set_quota_inode(inode, 68234013d47aSJan Kara I_DATA_SEM_NORMAL); 68244013d47aSJan Kara iput(inode); 68254013d47aSJan Kara } 68264013d47aSJan Kara } 68277f144fd0SJunichi Uekawa 68287c319d32SAditya Kali return err; 68297c319d32SAditya Kali } 68307c319d32SAditya Kali } 68317c319d32SAditya Kali } 68327c319d32SAditya Kali return 0; 68337c319d32SAditya Kali } 68347c319d32SAditya Kali 6835ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6836ca0e05e4SDmitry Monakhov { 683721f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 683821f97697SJan Kara handle_t *handle; 6839957153fcSJan Kara int err; 684021f97697SJan Kara 684187009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 684287009d86SDmitry Monakhov * Caller already holds s_umount sem */ 684387009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6844ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6845ca0e05e4SDmitry Monakhov 6846957153fcSJan Kara if (!inode || !igrab(inode)) 68470b268590SAmir Goldstein goto out; 68480b268590SAmir Goldstein 6849957153fcSJan Kara err = dquot_quota_off(sb, type); 6850964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6851957153fcSJan Kara goto out_put; 6852957153fcSJan Kara 6853957153fcSJan Kara inode_lock(inode); 685461a92987SJan Kara /* 685561a92987SJan Kara * Update modification times of quota files when userspace can 685661a92987SJan Kara * start looking at them. If we fail, we return success anyway since 685761a92987SJan Kara * this is not a hard failure and quotas are already disabled. 685861a92987SJan Kara */ 68599924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 68604209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 68614209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6862957153fcSJan Kara goto out_unlock; 68634209ae12SHarshad Shirwadkar } 6864957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6865957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6866eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 68674209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 686821f97697SJan Kara ext4_journal_stop(handle); 6869957153fcSJan Kara out_unlock: 6870957153fcSJan Kara inode_unlock(inode); 6871957153fcSJan Kara out_put: 6872964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6873957153fcSJan Kara iput(inode); 6874957153fcSJan Kara return err; 687521f97697SJan Kara out: 6876ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6877ca0e05e4SDmitry Monakhov } 6878ca0e05e4SDmitry Monakhov 6879ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6880ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6881ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6882ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6883617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6884ac27a0ecSDave Kleikamp size_t len, loff_t off) 6885ac27a0ecSDave Kleikamp { 6886ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6887725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6888ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6889ac27a0ecSDave Kleikamp int tocopy; 6890ac27a0ecSDave Kleikamp size_t toread; 6891ac27a0ecSDave Kleikamp struct buffer_head *bh; 6892ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6893ac27a0ecSDave Kleikamp 6894ac27a0ecSDave Kleikamp if (off > i_size) 6895ac27a0ecSDave Kleikamp return 0; 6896ac27a0ecSDave Kleikamp if (off+len > i_size) 6897ac27a0ecSDave Kleikamp len = i_size-off; 6898ac27a0ecSDave Kleikamp toread = len; 6899ac27a0ecSDave Kleikamp while (toread > 0) { 6900ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6901ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 69021c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 69031c215028STheodore Ts'o if (IS_ERR(bh)) 69041c215028STheodore Ts'o return PTR_ERR(bh); 6905ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6906ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6907ac27a0ecSDave Kleikamp else 6908ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6909ac27a0ecSDave Kleikamp brelse(bh); 6910ac27a0ecSDave Kleikamp offset = 0; 6911ac27a0ecSDave Kleikamp toread -= tocopy; 6912ac27a0ecSDave Kleikamp data += tocopy; 6913ac27a0ecSDave Kleikamp blk++; 6914ac27a0ecSDave Kleikamp } 6915ac27a0ecSDave Kleikamp return len; 6916ac27a0ecSDave Kleikamp } 6917ac27a0ecSDave Kleikamp 6918ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6919ac27a0ecSDave Kleikamp * enough credits) */ 6920617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6921ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6922ac27a0ecSDave Kleikamp { 6923ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6924725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 69254209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6926c5e298aeSTheodore Ts'o int retries = 0; 6927ac27a0ecSDave Kleikamp struct buffer_head *bh; 6928ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6929ac27a0ecSDave Kleikamp 6930380a0091SYe Bin if (!handle) { 6931b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6932b31e1552SEric Sandeen " cancelled because transaction is not started", 69339c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 69349c3013e9SJan Kara return -EIO; 69359c3013e9SJan Kara } 693667eeb568SDmitry Monakhov /* 693767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 693867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 693967eeb568SDmitry Monakhov */ 694067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 694167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 694267eeb568SDmitry Monakhov " cancelled because not block aligned", 694367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 694467eeb568SDmitry Monakhov return -EIO; 694567eeb568SDmitry Monakhov } 694667eeb568SDmitry Monakhov 6947c5e298aeSTheodore Ts'o do { 6948c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6949c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6950c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 695145586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6952c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 69531c215028STheodore Ts'o if (IS_ERR(bh)) 69541c215028STheodore Ts'o return PTR_ERR(bh); 6955ac27a0ecSDave Kleikamp if (!bh) 6956ac27a0ecSDave Kleikamp goto out; 69575d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6958188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 6959ac27a0ecSDave Kleikamp if (err) { 6960ac27a0ecSDave Kleikamp brelse(bh); 69611c215028STheodore Ts'o return err; 6962ac27a0ecSDave Kleikamp } 6963ac27a0ecSDave Kleikamp lock_buffer(bh); 696467eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6965ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6966ac27a0ecSDave Kleikamp unlock_buffer(bh); 69670390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6968ac27a0ecSDave Kleikamp brelse(bh); 6969ac27a0ecSDave Kleikamp out: 697067eeb568SDmitry Monakhov if (inode->i_size < off + len) { 697167eeb568SDmitry Monakhov i_size_write(inode, off + len); 6972617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 69734209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 69744209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 69754209ae12SHarshad Shirwadkar err = err2; 697621f97697SJan Kara } 69774209ae12SHarshad Shirwadkar return err ? err : len; 6978ac27a0ecSDave Kleikamp } 6979ac27a0ecSDave Kleikamp #endif 6980ac27a0ecSDave Kleikamp 6981c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 698224b58424STheodore Ts'o static inline void register_as_ext2(void) 698324b58424STheodore Ts'o { 698424b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 698524b58424STheodore Ts'o if (err) 698624b58424STheodore Ts'o printk(KERN_WARNING 698724b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 698824b58424STheodore Ts'o } 698924b58424STheodore Ts'o 699024b58424STheodore Ts'o static inline void unregister_as_ext2(void) 699124b58424STheodore Ts'o { 699224b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 699324b58424STheodore Ts'o } 69942035e776STheodore Ts'o 69952035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 69962035e776STheodore Ts'o { 6997e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 69982035e776STheodore Ts'o return 0; 6999bc98a42cSDavid Howells if (sb_rdonly(sb)) 70002035e776STheodore Ts'o return 1; 7001e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 70022035e776STheodore Ts'o return 0; 70032035e776STheodore Ts'o return 1; 70042035e776STheodore Ts'o } 700524b58424STheodore Ts'o #else 700624b58424STheodore Ts'o static inline void register_as_ext2(void) { } 700724b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 70082035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 700924b58424STheodore Ts'o #endif 701024b58424STheodore Ts'o 701124b58424STheodore Ts'o static inline void register_as_ext3(void) 701224b58424STheodore Ts'o { 701324b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 701424b58424STheodore Ts'o if (err) 701524b58424STheodore Ts'o printk(KERN_WARNING 701624b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 701724b58424STheodore Ts'o } 701824b58424STheodore Ts'o 701924b58424STheodore Ts'o static inline void unregister_as_ext3(void) 702024b58424STheodore Ts'o { 702124b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 702224b58424STheodore Ts'o } 70232035e776STheodore Ts'o 70242035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 70252035e776STheodore Ts'o { 7026e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 70272035e776STheodore Ts'o return 0; 7028e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 70292035e776STheodore Ts'o return 0; 7030bc98a42cSDavid Howells if (sb_rdonly(sb)) 70312035e776STheodore Ts'o return 1; 7032e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 70332035e776STheodore Ts'o return 0; 70342035e776STheodore Ts'o return 1; 70352035e776STheodore Ts'o } 703624b58424STheodore Ts'o 703703010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7038ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 703903010a33STheodore Ts'o .name = "ext4", 7040cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7041cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7042ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 704314f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7044ac27a0ecSDave Kleikamp }; 70457f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7046ac27a0ecSDave Kleikamp 7047e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7048e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7049e9e3bcecSEric Sandeen 70505dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7051ac27a0ecSDave Kleikamp { 7052e9e3bcecSEric Sandeen int i, err; 7053c9de560dSAlex Tomas 7054e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 705507c0c5d8SAl Viro ext4_li_info = NULL; 705607c0c5d8SAl Viro 70579a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 705812e9b892SDmitry Monakhov ext4_check_flag_values(); 7059e9e3bcecSEric Sandeen 7060e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7061e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7062e9e3bcecSEric Sandeen 706351865fdaSZheng Liu err = ext4_init_es(); 70646fd058f7STheodore Ts'o if (err) 70656fd058f7STheodore Ts'o return err; 706651865fdaSZheng Liu 70671dc0aa46SEric Whitney err = ext4_init_pending(); 70681dc0aa46SEric Whitney if (err) 706922cfe4b4SEric Biggers goto out7; 707022cfe4b4SEric Biggers 707122cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 707222cfe4b4SEric Biggers if (err) 70731dc0aa46SEric Whitney goto out6; 70741dc0aa46SEric Whitney 707551865fdaSZheng Liu err = ext4_init_pageio(); 707651865fdaSZheng Liu if (err) 7077b5799018STheodore Ts'o goto out5; 707851865fdaSZheng Liu 70795dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7080bd2d0210STheodore Ts'o if (err) 7081b5799018STheodore Ts'o goto out4; 7082857ac889SLukas Czerner 7083b5799018STheodore Ts'o err = ext4_init_sysfs(); 7084dd68314cSTheodore Ts'o if (err) 7085b5799018STheodore Ts'o goto out3; 7086857ac889SLukas Czerner 70875dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7088ac27a0ecSDave Kleikamp if (err) 7089c9de560dSAlex Tomas goto out2; 7090ac27a0ecSDave Kleikamp err = init_inodecache(); 7091ac27a0ecSDave Kleikamp if (err) 7092ac27a0ecSDave Kleikamp goto out1; 7093aa75f4d3SHarshad Shirwadkar 7094aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7095aa75f4d3SHarshad Shirwadkar if (err) 7096aa75f4d3SHarshad Shirwadkar goto out05; 7097aa75f4d3SHarshad Shirwadkar 709824b58424STheodore Ts'o register_as_ext3(); 70992035e776STheodore Ts'o register_as_ext2(); 710003010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7101ac27a0ecSDave Kleikamp if (err) 7102ac27a0ecSDave Kleikamp goto out; 7103bfff6873SLukas Czerner 7104ac27a0ecSDave Kleikamp return 0; 7105ac27a0ecSDave Kleikamp out: 710624b58424STheodore Ts'o unregister_as_ext2(); 710724b58424STheodore Ts'o unregister_as_ext3(); 7108ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7109aa75f4d3SHarshad Shirwadkar out05: 7110ac27a0ecSDave Kleikamp destroy_inodecache(); 7111ac27a0ecSDave Kleikamp out1: 71125dabfc78STheodore Ts'o ext4_exit_mballoc(); 71139c191f70ST Makphaibulchoke out2: 7114b5799018STheodore Ts'o ext4_exit_sysfs(); 7115b5799018STheodore Ts'o out3: 7116dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7117b5799018STheodore Ts'o out4: 71185dabfc78STheodore Ts'o ext4_exit_pageio(); 7119b5799018STheodore Ts'o out5: 712022cfe4b4SEric Biggers ext4_exit_post_read_processing(); 71211dc0aa46SEric Whitney out6: 712222cfe4b4SEric Biggers ext4_exit_pending(); 712322cfe4b4SEric Biggers out7: 712451865fdaSZheng Liu ext4_exit_es(); 712551865fdaSZheng Liu 7126ac27a0ecSDave Kleikamp return err; 7127ac27a0ecSDave Kleikamp } 7128ac27a0ecSDave Kleikamp 71295dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7130ac27a0ecSDave Kleikamp { 7131bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 713224b58424STheodore Ts'o unregister_as_ext2(); 713324b58424STheodore Ts'o unregister_as_ext3(); 713403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7135ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7136ac27a0ecSDave Kleikamp destroy_inodecache(); 71375dabfc78STheodore Ts'o ext4_exit_mballoc(); 7138b5799018STheodore Ts'o ext4_exit_sysfs(); 71395dabfc78STheodore Ts'o ext4_exit_system_zone(); 71405dabfc78STheodore Ts'o ext4_exit_pageio(); 714122cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7142dd12ed14SEric Sandeen ext4_exit_es(); 71431dc0aa46SEric Whitney ext4_exit_pending(); 7144ac27a0ecSDave Kleikamp } 7145ac27a0ecSDave Kleikamp 7146ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 714783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7148ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 71497ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 71505dabfc78STheodore Ts'o module_init(ext4_init_fs) 71515dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7152